EP1036639A2 - Method aud device for preparing a sprayable mortar to be used in a wet spraying process - Google Patents

Method aud device for preparing a sprayable mortar to be used in a wet spraying process Download PDF

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Publication number
EP1036639A2
EP1036639A2 EP00104397A EP00104397A EP1036639A2 EP 1036639 A2 EP1036639 A2 EP 1036639A2 EP 00104397 A EP00104397 A EP 00104397A EP 00104397 A EP00104397 A EP 00104397A EP 1036639 A2 EP1036639 A2 EP 1036639A2
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EP
European Patent Office
Prior art keywords
mixing
mortar
stage
pipe section
mixer
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.)
Withdrawn
Application number
EP00104397A
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German (de)
French (fr)
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EP1036639A3 (en
Inventor
Hans Richard Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inotec GmbH Transport und Foerdersysteme
Inotec GmbH
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Inotec GmbH Transport und Foerdersysteme
Inotec GmbH
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Publication of EP1036639A2 publication Critical patent/EP1036639A2/en
Publication of EP1036639A3 publication Critical patent/EP1036639A3/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10Mixing in containers not actuated to effect the mixing
    • B28C5/12Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/14Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis
    • B28C5/145Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis with several mixing chambers arranged one after the other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2123Shafts with both stirring means and feeding or discharging means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/62Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis comprising liquid feeding, e.g. spraying means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71Feed mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71Feed mechanisms
    • B01F35/712Feed mechanisms for feeding fluids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71Feed mechanisms
    • B01F35/717Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7176Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71Feed mechanisms
    • B01F35/717Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71775Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28CPREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10Mixing in containers not actuated to effect the mixing
    • B28C5/12Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1292Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with rotating stirring and feeding or discharging means fixed on the same axis, e.g. in an inclined container fed at its lower part

Definitions

  • the invention relates to a method for producing spray mortar for use in Wet spraying method according to the preamble of claim 1. - The invention further relates a device for performing the method according to the preamble of the claim 4th
  • Spray mortar can be produced by dry spraying or wet spraying.
  • the dry mortar is conveyed to the spray nozzle, where the added water and additives may be added.
  • the wet spray process is In contrast, characterized in that the completely prepared wet mortar up to Spray nozzle is conveyed and dispensed there.
  • the wet spray process is particularly used for work where minimal dust is required.
  • the mixing method according to the invention is particularly suitable for producing mortar in Wet spraying process intended for concrete replacement.
  • a previously known wet spraying method for spray mortar consists of two components, namely from a compulsory mixer and from a feed pump.
  • the compulsory mixer will given an appropriate amount of water.
  • the dry mortar is added, the material is added while the mixer is running.
  • the mortar is emptied from the compulsory mixer via a segment slide on the drum base.
  • the mortar then falls into the feed pump (for example eccentric screw pump) and is via a hose line fed to the point of consumption using the dense phase method.
  • a disadvantage of this known wet spraying method is that it is discontinuous Way of working. First the batch mixer is loaded with batches of 3 Bags (75 kg). After the forced mixing has been carried out, the Compulsory mixer. This interrupts the further production of wet mortar. In addition to the discontinuous mode of operation, another disadvantage is the known one Wet spraying process in that mixing times of approx. 3 minutes must be observed. The manufacturing performance is limited. Another disadvantage is that a Operator is required, which for loading the compulsory mixer with the batches and for emptying the compulsory mixer into the conveyor unit by hand worries. Finally, two voluminous devices are required, which are maintained accordingly and need to be cleaned.
  • a mortar mixing machine is known from DE-GM 93 19 066, in which one funnel-shaped storage container for the dry mortar a mixing device outside of Storage container is arranged on this. This mixing device has a water supply to the dry mortar pumped out of the reservoir with water to move and mix.
  • the invention has for its object to provide an improved process for preparing spray mortar for use in the wet spraying to create the dry mortar contains sparingly water-soluble content, in particular a eikomponentiger, resin-modified, mineral dry mortar; furthermore, an apparatus for carrying out the method is to be created.
  • the basic idea is that the mortar without the help of an operator is mixed continuously, i.e. Provide mixing water in the first mixing stage so that this first mixing stage serves as a mixing zone. In the subsequent second mixing stage, the final mixing takes place in this actual mixing zone of the pasted mortar.
  • the poorly soluble parts namely the plastic dispersions in particular in the second mixing stage in the mortar, so that finally the wet mortar in usable There is consistency.
  • the process can be operated remotely, it is a one-man control possible and the complete mixing and conveying system is in one system contain. Maintenance and cleaning are simplified by small technical units.
  • claims 2 and 3 have the advantage that they are difficult soluble parts in the mortar can be fully digested. This is done by a a correspondingly long residence time in the second mixing stage and in that In this second mixing stage, the mixing intensity is more intensive than in the dough zone of the first Mixing stage.
  • a preferred embodiment of the mixing device using a mixing tube proposes claim 5.
  • the mixing elements or mixing tools can be slanted mixing paddles or mixing blades act, which besides their mixing function also promote the mortar. Located in the area of the beginning of the mixing tube the water supply, while at the front end of the mixing tube the outlet for the Mixed material is provided.
  • Claim 6 proposes a preferred technical implementation of the mixing tube.
  • the Mixing tube and the mixing shaft are designed in two stages, the basic idea of Mixing tube consists of two cylinders with different diameters.
  • the two-stage Mixing shaft consists of two different sized mixing tool types in the two Pipe sections or mixing stages.
  • the pipe section of the second mixing stage one has a larger diameter than the pipe section of the first mixing stage, is therefore in this second pipe section created a larger volume than in the first pipe section.
  • the prerequisite is, of course, that the second pipe section has a corresponding length has that this larger volume is realized.
  • the second pipe section about the same length as the first pipe section. Due to the larger volume in second pipe section is therefore a longer residence time of the mortar in this second Mixing stage guaranteed.
  • a longer residence time means more intensive mixing. Since the mixing elements also have a larger one in the second pipe section Have radial length, is the circulation speed of the mixing elements in the radial outer area larger. A higher speed of the mixing elements means but also a more intensive mixing of the mortar.
  • the advantage of the further development according to claim 7 is that a "conventional" mixing device for the production of "normal” wet mortar (without sparingly soluble dispersants) easily and without problems with the invention Mixing device can be converted, for example, the mixing tube is flanged to the storage container by means of a tension lock.
  • the first, rear Pipe section of the mixing tube has a connecting flange and preferably also a diameter corresponding to the design of a "conventional” mixing tube.
  • the mortar mixer has a cuboid frame 1 in Euro pallet size (80 x 120 cm) or larger. Within this frame 1 there is a funnel-shaped storage container 3, which tapers towards the bottom, as shown in particular in Fig. 2 reveals.
  • a screw conveyor 3 is arranged in the bottom region of this storage container 2. Driven is this screw conveyor 3 by an electric motor 4, which is in the axial direction the screw conveyor 3 seen below the hopper slope of the storage container 2 and is located in particular within the circumferential contour of the frame 1.
  • the screw conveyor 3 opens into a metering tube 5 with a metering screw 6, namely afterwards to an opening 7 formed laterally in the storage container 2.
  • mixing device 8 On the outside of the storage container 2 there is a mixing device 8 with a mixing tube at the opening 7 9 made of steel with the mixing shaft 10 detachable therein (for example by clamping elements) arranged.
  • Mixing elements 11 are in shape on the mixing shaft 10 of radially protruding, wing-like paddles, which extend to the axial direction of the mixing shaft 10 are inclined. These mixing elements 11 are only indicated schematically in FIG. 1. They extend in the respective pipe section up to approximately the inner surface of the mixing pipe 9.
  • the mixing tube 9 has two cylindrical tube sections 9 ', 9' '.
  • the rear, first Pipe section 9 ' has a smaller diameter than the front, second Pipe section 9 ''.
  • the axial lengths of the two pipe sections 9 ', 9' ' are approximately the same length.
  • the volume of the second pipe section 9 ′′ is greater than the volume of the first pipe section 9 '.
  • the connection between the two pipe sections 9 ', 9' ' takes place through a central, central opening which is essentially the inner opening, i.e. corresponds to the clear width of the first pipe section 9 '.
  • the first pipe section 9 ′ has in the region of the opening 7 of the storage container 2 a water supply 12.
  • the corresponding water supply lines are not shown.
  • the second pipe section 9 ′′ has an outlet 13 at the front end which can be connected to a delivery hose, for example.
  • the mortar mixer works as follows:
  • the screw conveyor 3 is rotated by means of the electric motor 4.
  • the dry mortar is fed through the screw conveyor 3 to the metering screw 6.
  • the dosing screw 6 conveys a constant amount of dry mortar into the flanged one Mixing tube 9 of the mixing device 8.
  • the required amount of water is fed to the mixing tube 9 via the water supply 12.
  • the first pipe section 9 'of the mixing pipe 9 with the water supply 12 serves as a dough zone.
  • the dry mortar is brought into contact with the water, so that a moist mass is created.
  • the mixing takes place through the paddle-shaped mixing elements 11, which also serve as conveying elements and transport the pasted mortar in the direction of the second pipe section 9 ′′.
  • this second pipe section 9 '' has a larger internal volume than the first pipe section 9 ' the dwell time of the pasted mortar is longer than in the first pipe section 9 '. This means more intensive mixing of the mortar.
  • the mixing elements 11 in this second pipe section 9 ′′ longer than in the first pipe section 9 ′. This means that in the radial outer region of these mixing elements 11, the rotational speed is larger than indoors. A larger relative speed between the mixing elements 11 and the mortar means a more intensive mixing of the Mortar.
  • A serves as a conveying element conventional feed pump, for example an eccentric screw pump, which in the Embodiment is not shown.

Abstract

The method and appliance for producing spray mortar involve mixing water with dry mortar stored in a storage container (2). The two-stage mixer (8) is attached to the storage container and has a water feeder (12) and pump. The mixer is in the form of a pipe (9) inside which are mixer elements (11) on a rotary shaft (10). The mixer pipe has a first section (9') for the first mixer stage and an attached larger-diameter second section (9) for the second mixer stage. the mixer elements in the second pipe section have a greater radial length than in the first section.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Spritzmörtel zur Verwendung im Naßspritzverfahren gemäß dem Oberbegriff des Anspruchs 1. - Die Erfindung betrifft ferner eine Vorrichtung zur Durchführung des Verfahrens gemäß dem Oberbegriff des Anspruchs 4.The invention relates to a method for producing spray mortar for use in Wet spraying method according to the preamble of claim 1. - The invention further relates a device for performing the method according to the preamble of the claim 4th

Spritzmörtel kann im Trockenspritzverfahren oder im Naßspritzverfahren hergestellt werden. Beim Trockenspritzverfahren wird der Trockenmörtel zur Spritzdüse befördert, wo das Zugabewasser und gegebenenfalls Zusätze beigefügt werden. Das Naßspritzverfahren ist demgegenüber dadurch gekennzeichnet, daß der komplett vorbereitete Naßmörtel bis zur Spritzdüse gefördert und dort abgegeben wird. Das Naßspritzverfahren wird insbesondere bei Arbeiten eingesetzt, wo eine minimale Staubentwicklung gefordert ist.Spray mortar can be produced by dry spraying or wet spraying. In the dry spraying process, the dry mortar is conveyed to the spray nozzle, where the added water and additives may be added. The wet spray process is In contrast, characterized in that the completely prepared wet mortar up to Spray nozzle is conveyed and dispensed there. The wet spray process is particularly used for work where minimal dust is required.

Das erfindungsgemäße Mischverfahren ist insbesondere zum Herstellen von Mörtel im Naßspritzverfahren für Betonersatz gedacht. The mixing method according to the invention is particularly suitable for producing mortar in Wet spraying process intended for concrete replacement.

Ein bisher bekanntes Naßspritzverfahren für Spritzmörtel besteht aus zwei Komponenten, nämlich aus einem Zwangsmischer und aus einer Förderpumpe. Dem Zwangsmischer wird eine entsprechende Menge Wasser vorgegeben. Anschließend wird der Trockenmörtel zugegeben, wobei die Materialzugabe bei laufendem Mischwerk erfolgt. Nach vorgegebener Mischzeit von ca. 3 Minuten erfolgt die Entleerung des Mörtels aus dem Zwangsmischer über einen Segmentschieber am Trommelboden. Der Mörtel fällt anschließend in die Förderpumpe (beispielsweise Exzenterschneckenpumpe) und wird über eine Schlauchleitung im Dichtstromverfahren der Verbrauchsstelle zugeführt.A previously known wet spraying method for spray mortar consists of two components, namely from a compulsory mixer and from a feed pump. The compulsory mixer will given an appropriate amount of water. Then the dry mortar is added, the material is added while the mixer is running. According to the given Mixing time of approx. 3 minutes, the mortar is emptied from the compulsory mixer via a segment slide on the drum base. The mortar then falls into the feed pump (for example eccentric screw pump) and is via a hose line fed to the point of consumption using the dense phase method.

Ein Nachteil bei diesem bekannten Naßspritzverfahren besteht in der diskontinuierlichen Arbeitsweise. Zunächst erfolgt die Beschickung des Zwangsmischers mit Chargen von 3 Säcken (75 kg). Nach Durchführung der Zwangsmischung erfolgt die Entleerung des Zwangsmischers. Dadurch wird aber die weitere Herstellung von Naßmörtel unterbrochen. Außer der diskontinuierlichen Arbeitsweise liegt ein weiterer Nachteil bei dem bekannten Naßspritzverfahren darin, daß Mischzeiten von ca. 3 Minuten eingehalten werden müssen. Die Herstellungsleistung ist damit beschränkt. Ein weiterer Nachteil besteht darin, daß eine Bedienungsperson erforderlich ist, welche für die Beschickung des Zwangsmischers mit den Chargen sowie für die Entleerung des Zwangsmischers in die Fördereinheit per Hand sorgt. Schließlich sind zwei voluminöse Geräte erforderlich, welche entsprechend gewartet und gereinigt werden müssen.A disadvantage of this known wet spraying method is that it is discontinuous Way of working. First the batch mixer is loaded with batches of 3 Bags (75 kg). After the forced mixing has been carried out, the Compulsory mixer. This interrupts the further production of wet mortar. In addition to the discontinuous mode of operation, another disadvantage is the known one Wet spraying process in that mixing times of approx. 3 minutes must be observed. The manufacturing performance is limited. Another disadvantage is that a Operator is required, which for loading the compulsory mixer with the batches and for emptying the compulsory mixer into the conveyor unit by hand worries. Finally, two voluminous devices are required, which are maintained accordingly and need to be cleaned.

Aus dem DE-GM 93 19 066 ist eine Mörtelmischmaschine bekannt, bei dem an einem trichterförmigen Vorratsbehälter für den Trockenmörtel eine Mischeinrichtung außerhalb des Vorratsbehälters an diesem angeordnet ist. Diese Mischeinrichtung weist dabei eine Wasserzuführung auf, um den aus dem Vorratsbehälter geförderten Trockenmörtel mit Wasser zu versetzen und zu vermischen.A mortar mixing machine is known from DE-GM 93 19 066, in which one funnel-shaped storage container for the dry mortar a mixing device outside of Storage container is arranged on this. This mixing device has a water supply to the dry mortar pumped out of the reservoir with water to move and mix.

Allerdings ist es mit dieser Mörtelmischmaschine nicht möglich, Spritzmörtel aus einem einkomponentigen, kunststoffmodifizierten, mineralischen Trockenmörtel herzustellen, da in dieser Art von Trockenmörtel schwer lösliche Anteile, nämlich schwer lösliche Kunststoffdispersionen enthalten sind. Eine Auflösung dieser Dispersionen ist während der Zeitdauer des Passierens der rohrförmigen Mischeinrichtung nicht möglich.However, with this mortar mixing machine it is not possible to spray mortar from a one-component, to produce plastic-modified, mineral dry mortar, because in This type of dry mortar has poorly soluble proportions, namely poorly soluble plastic dispersions are included. A dissolution of these dispersions is during the period passing through the tubular mixing device is not possible.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein verbessertes Verfahren zum Herstellen von Spritzmörtel zur Verwendung im Naßspritzverfahren zu schaffen, wobei der Trockenmörtel in Wasser schwer lösliche Anteile enthält, insbesondere ein eikomponentiger, kunststoffmodifizierter, mineralischer Trockenmörtel; weiterhin soll eine Vorrichtung zur Durchführung des Verfahrens geschaffen werden.On this basis the invention has for its object to provide an improved process for preparing spray mortar for use in the wet spraying to create the dry mortar contains sparingly water-soluble content, in particular a eikomponentiger, resin-modified, mineral dry mortar; furthermore, an apparatus for carrying out the method is to be created.

Die technische Lösung ergibt sich verfahrensmaßig durch die Merkmale im Kennzeichen des Anspruchs 1.The technical solution results procedurally from the features in the characterizing part of claim 1.

Im Gegensatz zu dem bekannten, diskontinuierlich arbeitenden Zwangsmischer arbeitet das erfindungsgemäße Verfahren zum Herstellen von Spritzmörtel zur Verwendung im Naßspritzverfahren kontinuierlich, obwohl in dem Trockenmörtel schwer lösliche Anteile enthalten sind (insbesondere ein einkomponentiger, kunststoffmodifizierter, mineralischer Trockenmörtel), welche während des kontinuierlichen Verfahrensablaufs dennoch gelöst werden. Die Grundidee besteht darin, daß der Mörtel ohne Zuhilfenahme einer Bedienungsperson fortlaufend angemischt wird, d.h. in der ersten Mischstufe mit Anmachwasser versehen wird, so daß diese erste Mischstufe als Anmachzone dient. In der sich anschließenden zweiten Mischstufe erfolgt dann in dieser eigentlichen Mischzone die endgültige Durchmischung des angeteigten Mörtels. Durch diese zweistufige Verfahrensdurchführung werden die schwer löslichen Anteile, nämlich die Kunststoffdispersionen insbesondere in der zweiten Mischstufe im Mörtel aufgeschlossen, so daß schließlich der Naßmörtel in verwendbarer Konsistenz vorhanden ist. Das Verfahren ist fembedienbar, es ist eine Einmannsteuerung möglich und die komplette Misch- und Förderanlage ist in einem System enthalten. Die Wartung und Reinigung ist durch kleine technische Einheiten vereinfacht.In contrast to the known, discontinuously operating compulsory mixer, this works Process according to the invention for producing spray mortar for use in the wet spray process continuous, even though it contains poorly soluble components in the dry mortar are (in particular a one-component, plastic-modified, mineral dry mortar), which are nevertheless resolved during the continuous process. The basic idea is that the mortar without the help of an operator is mixed continuously, i.e. Provide mixing water in the first mixing stage so that this first mixing stage serves as a mixing zone. In the subsequent second mixing stage, the final mixing takes place in this actual mixing zone of the pasted mortar. Through this two-stage process implementation the poorly soluble parts, namely the plastic dispersions in particular in the second mixing stage in the mortar, so that finally the wet mortar in usable There is consistency. The process can be operated remotely, it is a one-man control possible and the complete mixing and conveying system is in one system contain. Maintenance and cleaning are simplified by small technical units.

Die Weiterbildungen der Ansprüche 2 und 3 bringen den Vorteil mit sich, daß die schwer löslichen Anteile im Mörtel vollständig aufgeschlossen werden können. Dies wird durch eine entsprechend lange Verweildauer in der zweiten Mischstufe erreicht sowie dadurch, daß in dieser zweiten Mischstufe die Mischintensität intensiver ist als in der Anteigzone der ersten Mischstufe.The developments of claims 2 and 3 have the advantage that they are difficult soluble parts in the mortar can be fully digested. This is done by a a correspondingly long residence time in the second mixing stage and in that In this second mixing stage, the mixing intensity is more intensive than in the dough zone of the first Mixing stage.

Die technische Lösung zur Durchführung des Verfahrens ergibt sich vorrichtungsmäßig durch die Merkmale im Kennzeichen des Anspruchs 4.The technical solution for performing the method results in the apparatus, by the features in the characterizing part of the claim. 4

Dadurch ist eine kontinuierlich arbeitende Mischmaschine mit einer zweistufigen Mischeinrichtung geschaffen, welche als Durchlaufmischer arbeitet. Es handelt sich dabei um ein integriertes System aus einem Vorratsbehälter, einer Mörtelmischeinrichtung bestehend aus einem Zweistufenmischer als Durchlaufmischer sowie einem Fördersystem bestehend aus einer Förderpumpe (beispielsweise Exzenterschneckenpumpe). This makes a continuously operating mixing machine with a two-stage mixing device created, which works as a continuous mixer. It is a Integrated system consisting of a storage container and a mortar mixing device a two-stage mixer as a continuous mixer and a conveyor system consisting of a feed pump (for example eccentric screw pump).

Eine bevorzugte Ausbildung der Mischeinrichtung unter Verwendung eines Mischrohres schlägt Anspruch 5 vor. Bei den Mischelementen bzw. Mischwerkzeugen kann es sich um schräg angestellte Mischpaddel oder Mischflügel handeln, welche außer ihrer Mischfunktion zugleich auch den Mörtel fördern. Im Bereich des Anfangs des Mischrohres befindet sich die Wasserzuführung, während am vorderen Ende des Mischrohres der Auslauf für das Mischgut vorgesehen ist.A preferred embodiment of the mixing device using a mixing tube proposes claim 5. The mixing elements or mixing tools can be slanted mixing paddles or mixing blades act, which besides their mixing function also promote the mortar. Located in the area of the beginning of the mixing tube the water supply, while at the front end of the mixing tube the outlet for the Mixed material is provided.

Eine bevorzugte technische Realisierung des Mischrohres schlägt der Anspruch 6 vor. Das Mischrohr und die Mischwelle sind dabei zweistufig ausgebildet, wobei die Grundidee des Mischrohres in zwei Zylindern mit unterschiedlichen Durchmessem besteht. Die zweistufige Mischwelle besteht aus zwei unterschiedlich großen Mischwerkzeugtypen in den beiden Rohrabschnitten bzw. Mischstufen. Indem der Rohrabschnitt der zweiten Mischstufe einen größeren Durchmesser aufweist als der Rohrabschnitt der ersten Mischstufe, ist dadurch in diesem zweiten Rohrabschnitt ein größeres Volumen geschaffen als im ersten Rohrabschnitt. Voraussetzung ist natürlich, daß der zweite Rohrabschnitt eine entsprechende Länge aufweist, daß dieses größere Volumen realisiert ist. Vorzugsweise ist der zweite Rohrabschnitt in etwa gleich lang wie der erste Rohrabschnitt. Durch das größere Volumen im zweiten Rohrabschnitt ist somit eine längere Verweilzeit des Mörtels in dieser zweiten Mischstufe gewährleistet. Eine längere Verweilzeit bedeutet aber eine intensivere Durchmischung. Da darüber hinaus im zweiten Rohrabschnitt die Mischelemente eine größere Radiallänge aufweisen, ist entsprechend die Umlaufgeschwindigkeit der Mischelemente im radialen Außenbereich größer. Eine größere Geschwindigkeit der Mischelemente bedeutet aber gleichermaßen eine intensivere Durchmischung des Mörtels.Claim 6 proposes a preferred technical implementation of the mixing tube. The Mixing tube and the mixing shaft are designed in two stages, the basic idea of Mixing tube consists of two cylinders with different diameters. The two-stage Mixing shaft consists of two different sized mixing tool types in the two Pipe sections or mixing stages. By the pipe section of the second mixing stage one has a larger diameter than the pipe section of the first mixing stage, is therefore in this second pipe section created a larger volume than in the first pipe section. The prerequisite is, of course, that the second pipe section has a corresponding length has that this larger volume is realized. Preferably the second pipe section about the same length as the first pipe section. Due to the larger volume in second pipe section is therefore a longer residence time of the mortar in this second Mixing stage guaranteed. A longer residence time means more intensive mixing. Since the mixing elements also have a larger one in the second pipe section Have radial length, is the circulation speed of the mixing elements in the radial outer area larger. A higher speed of the mixing elements means but also a more intensive mixing of the mortar.

Der Vorteil der Weiterbildung gemäß Anspruch 7 schließlich besteht darin, daß eine "herkömmliche" Mischvorrichtung zur Herstellung von "normalem" Naßmörtel (also ohne schwerlösliche Dispersionsstoffe) ohne weiteres und ohne Probleme mit der erfindungsgemäßen Mischeinrichtung umgerüstet werden kann, indem beispielsweise das Mischrohr durch einen Spannverschluß am Vorratsbehälter angeflanscht wird. Der erste, hintere Rohrabschnitt des Mischrohres hat dabei einen Anschlußflansch und vorzugsweise auch einen Durchmesser entsprechend der Ausbildung bei einem "herkömmlichen" Mischrohr. Dadurch ist eine universell einsetzbare Mörtelmischmaschine realisiert, welche nicht nur zum Herstellen von "normalem" Mörtel geeignet ist, sondern auch zum Herstellen von Mörtel, welcher schwer lösliche Anteile enthält, insbesondere ein einkomponentiger, kunststoffmodifizierter, mineralischer Trockenmörtel. Es ist lediglich erforderlich, für diesen Einsatzzweck das Mischrohr auszutauschen. Finally, the advantage of the further development according to claim 7 is that a "conventional" mixing device for the production of "normal" wet mortar (without sparingly soluble dispersants) easily and without problems with the invention Mixing device can be converted, for example, the mixing tube is flanged to the storage container by means of a tension lock. The first, rear Pipe section of the mixing tube has a connecting flange and preferably also a diameter corresponding to the design of a "conventional" mixing tube. This realizes a universal mortar mixing machine, which not only is suitable for the production of "normal" mortar, but also for the production of mortar, which contains poorly soluble components, in particular a one-component, plastic-modified, mineral dry mortar. It is only necessary for this purpose replace the mixing tube.

Ein Ausführungsbeispiel einer erfindungsgemäßen Mörtelmischmaschine zum Herstellen von Spritzmörtel zur Verwendung im Naßspritzverfahren wird nachfolgend anhand der Zeichnungen beschrieben. In diesen zeigt:

Fig. 1
einen Längsschnitt durch die Mörtelmischmaschine;
Fig. 2
eine Stimansicht der Mörtelmischmaschine in Fig. 1;
Fig. 3
eine Ansicht auf das hintere Ende des Mischrohres.
An embodiment of a mortar mixing machine according to the invention for producing spray mortar for use in the wet spraying process is described below with reference to the drawings. In these shows:
Fig. 1
a longitudinal section through the mortar mixer;
Fig. 2
an end view of the mortar mixing machine in Fig. 1;
Fig. 3
a view of the rear end of the mixing tube.

Die Mörtelmischmaschine weist ein quaderförmiges Gestell 1 in Euro-Palettengröße (80 x 120 cm) oder größer auf. Innerhalb dieses Gestells 1 befindet sich ein trichterförmiger Vorratsbehälter 3, welcher nach unten hin konisch zuläuft, wie insbesondere die Darstellung in Fig. 2 erkennen läßt.The mortar mixer has a cuboid frame 1 in Euro pallet size (80 x 120 cm) or larger. Within this frame 1 there is a funnel-shaped storage container 3, which tapers towards the bottom, as shown in particular in Fig. 2 reveals.

Im Bodenbereich dieses Vorratsbehälters 2 ist eine Förderschnecke 3 angeordnet. Angetrieben wird diese Förderschnecke 3 durch einen Elektromotor 4, welcher sich in Axialrichtung der Förderschnecke 3 gesehen unterhalb der Trichterschräge des Vorratsbehälters 2 und dabei insbesondere innerhalb der Umfangskontur des Gestells 1 befindet. Die Förderschnecke 3 mündet in einem Dosierrohr 5 mit einer Dosierschnecke 6, und zwar im Anschluß an eine im Vorratsbehälter 2 seitlich ausgebildete Öffnung 7.A screw conveyor 3 is arranged in the bottom region of this storage container 2. Driven is this screw conveyor 3 by an electric motor 4, which is in the axial direction the screw conveyor 3 seen below the hopper slope of the storage container 2 and is located in particular within the circumferential contour of the frame 1. The screw conveyor 3 opens into a metering tube 5 with a metering screw 6, namely afterwards to an opening 7 formed laterally in the storage container 2.

Außen am Vorratsbehälter 2 ist an der Öffnung 7 eine Mischeinrichtung 8 mit einem Mischrohr 9 aus Stahl mit darin befindlicher Mischwelle 10 lösbar (beispielsweise durch Spannelemente) angeordnet. Auf der Mischwelle 10 befinden sich Mischelemente 11 in Form von radial abstehenden, flügelartigen Paddeln, welche zur Axialrichtung der Mischwelle 10 schräg angestellt sind. In Fig. 1 sind diese Mischelemente 11 nur schematisch angedeutet. Sie reichen im jeweiligen Rohrabschnitt bis etwa zur Innemantelfläche des Mischrohres 9.On the outside of the storage container 2 there is a mixing device 8 with a mixing tube at the opening 7 9 made of steel with the mixing shaft 10 detachable therein (for example by clamping elements) arranged. Mixing elements 11 are in shape on the mixing shaft 10 of radially protruding, wing-like paddles, which extend to the axial direction of the mixing shaft 10 are inclined. These mixing elements 11 are only indicated schematically in FIG. 1. They extend in the respective pipe section up to approximately the inner surface of the mixing pipe 9.

Das Mischrohr 9 weist zwei zylinderförmige Rohrabschnitte 9', 9'' auf. Der hintere, erste Rohrabschnitt 9' weist dabei einen geringeren Durchmesser auf als der vordere, zweite Rohrabschnitt 9''. Die Axiallängen der beiden Rohrabschnitte 9', 9'' sind in etwa gleich lang. Auf jeden Fall ist das Volumen des zweiten Rohrabschnittes 9'' größer als das Volumen des ersten Rohrabschnittes 9'. Die Verbindung zwischen den beiden Rohrabschnitten 9', 9'' erfolgt durch eine mittige, zentrale Öffnung, welche im wesentlichen der Innenöffnung, d.h. der lichten Weite des ersten Rohrabschnittes 9' entspricht. The mixing tube 9 has two cylindrical tube sections 9 ', 9' '. The rear, first Pipe section 9 'has a smaller diameter than the front, second Pipe section 9 ''. The axial lengths of the two pipe sections 9 ', 9' 'are approximately the same length. In any case, the volume of the second pipe section 9 ″ is greater than the volume of the first pipe section 9 '. The connection between the two pipe sections 9 ', 9' 'takes place through a central, central opening which is essentially the inner opening, i.e. corresponds to the clear width of the first pipe section 9 '.

Weiterhin weist der erste Rohrabschnitt 9' im Bereich der Öffnung 7 des Vorratsbehälters 2 eine Wasserzuführung 12 auf. Die entsprechenden Wasseranschlußleitungen sind nicht dargestellt.Furthermore, the first pipe section 9 ′ has in the region of the opening 7 of the storage container 2 a water supply 12. The corresponding water supply lines are not shown.

Schließlich weist der zweite Rohrabschnitt 9'' am vorderen Ende einen Auslauf 13 auf, an den beispielsweise ein Förderschlauch angeschlossen werden kann.Finally, the second pipe section 9 ″ has an outlet 13 at the front end which can be connected to a delivery hose, for example.

Die Mörtelmischmaschine funktioniert wie folgt:The mortar mixer works as follows:

In dem Vorratsbehälter 2 befindet sich Trockenmörtel, nämlich ein einkomponentiger, kunststoffmodifizierter, mineralischer Werktrockenmörtel. Zum Betrieb der Mörtelmischmaschine wird mittels des Elektromotors 4 die Förderschnecke 3 in eine Drehbewegung versetzt. Der Trockenmörtel wird dabei durch die Förderschnecke 3 der Dosierschnecke 6 zugeführt. Die Dosierschnecke 6 fördert eine konstante Menge Trockenmörtel in das angeflanschte Mischrohr 9 der Mischeinrichtung 8. Durch das installierte Wasserdosiersystem wird die erforderliche Menge Wasser dem Mischrohr 9 über die Wasserzuführung 12 zugeführt.In the reservoir 2 there is dry mortar, namely a one-component, plastic-modified, mineral dry mortar. To operate the mortar mixer the screw conveyor 3 is rotated by means of the electric motor 4. The dry mortar is fed through the screw conveyor 3 to the metering screw 6. The dosing screw 6 conveys a constant amount of dry mortar into the flanged one Mixing tube 9 of the mixing device 8. Through the installed water metering system the required amount of water is fed to the mixing tube 9 via the water supply 12.

Der erste Rohrabschnitt 9' des Mischrohres 9 mit der Wasserzuführung 12 dient als Anteigzone. In dieser ersten Mischstufe wird der Trockenmörtel in Kontakt mit dem Wasser gebracht, so daß eine feuchte Masse entsteht. Die Durchmischung erfolgt dabei durch die paddelförmigen Mischelemente 11, welche zugleich auch als Förderelemente dienen und den angeteigten Mörtel in Richtung zweiten Rohrabschnitt 9'' transportieren.The first pipe section 9 'of the mixing pipe 9 with the water supply 12 serves as a dough zone. In this first mixing stage, the dry mortar is brought into contact with the water, so that a moist mass is created. The mixing takes place through the paddle-shaped mixing elements 11, which also serve as conveying elements and transport the pasted mortar in the direction of the second pipe section 9 ″.

Da dieser zweite Rohrabschnitt 9'' ein größeres Innenvolumen als der erste Rohrabschnitt 9' besitzt, ist darin die Verweilzeit des angeteigten Mörtels länger als im ersten Rohrabschnitt 9'. Dies bedeutet eine intensivere Durchmischung des Mörtels. Darüber hinaus sind die Mischelemente 11 in diesem zweiten Rohrabschnitt 9'' länger als im ersten Rohrabschnitt 9'. Dies bedeutet, daß im radialen Außenbereich dieser Mischelemente 11 die Umlaufgeschwindigkeit größer ist als im Innenbereich. Eine größere Relativgeschwindigkeit zwischen den Mischelementen 11 und dem Mörtel bedeutet aber eine intensivere Durchmischung des Mörtels.Since this second pipe section 9 '' has a larger internal volume than the first pipe section 9 ' the dwell time of the pasted mortar is longer than in the first pipe section 9 '. This means more intensive mixing of the mortar. In addition, the mixing elements 11 in this second pipe section 9 ″ longer than in the first pipe section 9 ′. This means that in the radial outer region of these mixing elements 11, the rotational speed is larger than indoors. A larger relative speed between the mixing elements 11 and the mortar means a more intensive mixing of the Mortar.

Insgesamt durchläuft der Mörtel in 10 bis 15 Sekunden das Mischrohr 9. Durch die intensive Durchmischung des Mörtels werden auch die darin befindlichen schwerlöslichen Kunststoffdispersionen aufgeschlossen und gelöst, so daß der Mörtel nach Passieren des Auslaufs 13 im Naßspritzverfahren weiterverarbeitet werden kann. Als Förderelement dient eine herkömmliche Förderpumpe, beispielsweise eine Exzenterschneckenpumpe, welche in dem Ausführungsbeispiel nicht dargestellt ist. In total, the mortar passes through the mixing tube 9 in 10 to 15 seconds The poorly soluble plastic dispersions contained therein also become mixed unlocked and loosened so that the mortar after passing the spout 13 can be further processed in the wet spray process. A serves as a conveying element conventional feed pump, for example an eccentric screw pump, which in the Embodiment is not shown.

BezuagszeichenlisteReference character list

11
Gestellframe
22nd
VorratsbehälterStorage container
33rd
FörderschneckeAuger
44th
ElektromotorElectric motor
55
DosierrohrDosing tube
66
DosierschneckeDosing screw
77
Öffnungopening
88th
MischeinrichtungMixing device
99
MischrohrMixing tube
9'9 '
erster Rohrabschnittfirst pipe section
9''9 ''
zweiter Rohrabschnittsecond pipe section
1010th
MischwelleMixed wave
1111
MischelementMixing element
1212th
WasserzuführungWater supply
1313
AuslaufSpout

Claims (7)

Verfahren zum Herstellen von Spritzmörtel zur Verwendung im Naßspritzverfahren, bei dem Trockenmörtel mit Wasser versetzt und anschließend vermischt wird und bei dem schließlich der Naßmörtel insbesondere im Dichtstromverfahren gefördert wird,
dadurch gekennzeichnet, daß das Herstellen des Spritzmörtels kontinuierlich mit einem zweistufigen Mischverfahren erfolgt,
wobei in der ersten Mischstufe das Wasser dem Trockenmörtel zugegeben wird und die beiden Komponenten vorgemischt werden und
wobei in der anschließenden zweiten Mischstufe die endgültige Durchmischung durchgeführt wird.
Process for the preparation of spray mortar for use in the wet spray process, in which dry mortar is mixed with water and then mixed, and in which the wet mortar is finally conveyed, in particular in the dense flow process,
characterized, that the spray mortar is produced continuously using a two-stage mixing process,
the water being added to the dry mortar in the first mixing stage and the two components being premixed and
the final mixing being carried out in the subsequent second mixing stage.
Verfahren nach dem vorhergehenden Anspruch,
dadurch gekennzeichnet, daß in der zweiten Mischstufe die Verweildauer der Komponenten länger ist als in der ersten Mischstufe.
Method according to the preceding claim,
characterized, that the residence time of the components is longer in the second mixing stage than in the first mixing stage.
Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß in der zweiten Mischstufe die Mischintensität der Komponenten stärker ist als in der ersten Mischstufe.
Method according to one of the preceding claims,
characterized, that in the second mixing stage the mixing intensity of the components is stronger than in the first mixing stage.
Vorrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche mit einem Vorratsbehälter (2) für den Trockenmörtel, mit einer an den Vorratsbehälter (2) angeschlossenen Mischeinrichtung (8) mit einer Wasserzuführung (12) sowie mit einer Förderpumpe,
dadurch gekennzeichnet,
daß die Mischeinrichtung (8) zweistufig ausgebildet ist, wobei die erste Mischstufe der Mischeinrichtung (8) die Wasserzuführung (12) aufweist.
Device for carrying out the method according to one of the preceding claims with a storage container (2) for the dry mortar, with a mixing device (8) connected to the storage container (2) with a water supply (12) as well as with a feed pump,
characterized by
that the mixing device (8) is designed in two stages, the first mixing stage of the mixing device (8) having the water supply (12).
Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß die Mischeinrichtung (8) als Mischrohr (9) ausgebildet ist, innerhalb dem auf einer drehbaren Mischwelle (10) Mischelemente (11) angeordnet sind.
Device according to claim 4,
characterized, that the mixing device (8) is designed as a mixing tube (9) within which mixing elements (11) are arranged on a rotatable mixing shaft (10).
Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß das Mischrohr (9) einen ersten Rohrabschnitt (9') für die erste Mischstufe sowie einen daran sich anschließenden zweiten Rohrabschnitt (9'') für die zweite Mischstufe aufweist,
wobei der zweite Rohrabschnitt (9'') einen größeren Durchmesser als der erste Rohrabschnitt (9') aufweist und
wobei im zweiten Rohrabschnitt (9'') die Mischelemente (11) eine größere Radiallänge als im ersten Rohrabschnitt (9') aufweisen.
Device according to claim 5,
characterized, that the mixing tube (9) has a first tube section (9 ') for the first mixing stage and an adjoining second tube section (9'') for the second mixing stage,
wherein the second pipe section (9 '') has a larger diameter than the first pipe section (9 ') and
wherein in the second pipe section (9 '') the mixing elements (11) have a greater radial length than in the first pipe section (9 ').
Vorrichtung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, daß die Mischeinrichtung (8) lösbar an dem Vorratsbehälter (2) anbringbar ist.
Device according to one of claims 4 to 6,
characterized, that the mixing device (8) can be detachably attached to the storage container (2).
EP00104397A 1999-03-15 2000-03-02 Method aud device for preparing a sprayable mortar to be used in a wet spraying process Withdrawn EP1036639A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19911368 1999-03-15
DE19911368A DE19911368B4 (en) 1999-03-15 1999-03-15 Apparatus for producing sprayed mortar for use in wet spraying

Publications (2)

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EP1036639A2 true EP1036639A2 (en) 2000-09-20
EP1036639A3 EP1036639A3 (en) 2002-07-10

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AT504803B1 (en) * 2004-07-14 2008-11-15 Johann Dipl Ing Keil APPENDIX FOR THE PRODUCTION AND PROCESSING OF WET-SPRAYING MIXTURE

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EP0496685A1 (en) * 1991-01-22 1992-07-29 Omniplastic S.A. Method and device for preparing, transferring and applying continuously a fluid aqueous mineral cleaning down suspension
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT504803B1 (en) * 2004-07-14 2008-11-15 Johann Dipl Ing Keil APPENDIX FOR THE PRODUCTION AND PROCESSING OF WET-SPRAYING MIXTURE
EP1688176A3 (en) * 2005-02-03 2006-08-30 alsecco GmbH & Co. KG Pumping and mixing apparatus for powder and liquid materials and sytem for producing viscous materials for building purposes

Also Published As

Publication number Publication date
DE19911368A1 (en) 2000-09-21
EP1036639A3 (en) 2002-07-10
DE19911368B4 (en) 2012-10-04

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