DE202021104334U1 - Plant for the production of a mineral foam - Google Patents

Abstract

Plant for producing a mineral foam, comprising a dosing device (3) for solids, a slurry mixer (1) for mixing the solids and a mixing liquid to form a slurry, at least one foam producing device for providing a foam, a foam mixer (2) for mixing the slurry and the Foam to a mineral foam, a pump (13) for pumping the mineral foam, the slurry mixer (1) and the foam mixer (2) being designed as continuous mixers, characterized in that the system is arranged in a transport container (5) and operated in this will.

Description

The invention relates to a continuous mixing system which is used to mix powdery and / or granular solids with a liquid to form a slurry and to foam this slurry into a mineral foam and to pump it to the filling location.

The advantages of the continuous mixing plant according to the invention are particularly valuable when the foamed slurry produced with it is a self-hardening mass, in particular a rapidly hardening mass, for example a mineral formulation such as foam concrete or a foamed mineral thermal insulation material.

A problem with mixing powdery and / or granular solids with liquid to form a self-curing foamed slurry is that the slurry and foam must be thoroughly mixed and transported carefully to the filling location so that the foam structure is not destroyed.

Another problem is that after the discharge from the mixer has ended, a residue of slurry remains as an adhesion in the mixer and hardens there if the mixer is not cleaned promptly. By using a continuous mixer, with the help of which you can mix continuously over a longer period of time - and not having to mix in individual separate batches with downtimes in between - the cleaning effort is reduced, but here too, after the discharge has taken place or in the event of an unscheduled If the mixer is stopped, cleaning can be carried out.

Typical continuous mixers for the production of self-hardening slurry from powdery and / or granular solids and water have a conveying device and a mixer, the conveying device continuously moving the solids through an opening into the chamber of the mixer, with liquid entering the mixer chamber through at least one additional opening Chamber of the mixer is introduced, the mixer mixing continuously and the slurry continuously forming in the mixer flowing continuously out of the mixer through a further opening. There are many methods and devices known from the prior art for adding a foam component or compressed air to the slurry in order to obtain a foamed or air-entrained building material.

DE19843777 C1 , EP0120812 A2 and WO9615889 A1 show devices for mixing a slurry.

CN209755551 U , CN203449434 U and CN201249476 Y describe devices to produce foam concrete from concrete and to pump it.

the DE102019122041 A1 describes a system for mixing a lightweight mixture of binder and bulk material and forcing the lightweight mixture to be conveyed using compressed air.

the DE 3100443 A1 shows a continuous mixer for concrete or foam concrete, in which the solids are transported via a screw conveyor from the bottom of a loading container into the chamber of a horizontally arranged mixer. Mixing water is added in the front part of the mixer and the slurry is mixed. Then foam is added in the rear part of the mixer and mixed into the slurry.

the DE 3629674 A1 and the WO 2011044604 show similar continuous mixers, although the screw conveyor and mixer rotor do not have a common shaft and can be driven separately from one another. This means that the mixer can be emptied if only the screw conveyor and the other material supply are switched off. When cleaning the mixer, which usually takes place by spraying cleaning liquid into the mixing chamber, cleaning liquid can also reach the conveyed material located at the mixer-side end region of the screw conveyor and form a self-hardening mass with it.

the WO 2011106816 A1 shows a mixing plant for the production of a mineral foam, in which a flowable slurry is mixed in a first mixing section, which is mixed with foam in a second mixing section. As far as can be inferred from the general description of the system, both mixing sections are arranged horizontally and there is no eccentric screw pump.

the EP 1065033 A2 shows a continuous mixer in which the powdery and / or granular solids are introduced from above into a vertical mixing chamber and not, as in the aforementioned documents, from one side into a horizontally arranged mixing chamber. An eccentric screw pump is connected to the lower end of the mixing chamber, which is used to transport the slurry to the place of use. When the mixer is cleaned by sprayed-in liquid, the risk of liquid reaching powdery and / or granular solids that are not yet in the mixing chamber and forming a hardenable mass with them is thus somewhat reduced. Due to the design, in particular due to the vertical alignment of the material flow through the mixing chamber and the one directly following it The amount of slurry produced can be set within a wide range and the amount of slurry in the system can be reduced by conveying through the pump without an intermediate container.

the DE 2437231 A1 shows a vertical mixer, which has an eccentric screw pump at the lower end. In the middle of the eccentric screw pump, which is preferably designed in two stages, compressed air is added to the slurry. On the output side, the eccentric screw pump is followed by a vortex chamber in which a rapidly rotating tool continues to mix the slurry mixed with compressed air. The disadvantage is that the agitator is mounted vertically in the vortex chamber and rotates quickly, which means that the mixing section in the vortex chamber is limited to the diameter of the agitator and the brief, vigorous mixing can have a negative impact on the structure of the air pores.

the DE 3807250 A1 shows a continuous mixer for mixing a slurry and a foam component. The mixer is fed with slurry via the hose line of a concrete pump, with the foam also being injected into the mixer. The disadvantage is that a premixed slurry is used, which is transported to the storage tank of a concrete pump and from there via a hose line to the mixer. The device shown is therefore suitable for use on a construction site in which a certain distance has to be overcome between the pump and the place of use. This device is unsuitable for the production of prefabricated components such as thermal insulation panels from rapidly hardening foamed slurry.

the DE 4408088 A1 shows a method for the production of a porous mineral light insulation board. A slurry is mixed in a first mixer, which enters an intermediate container and is transported away by a pump via a line. The line of the slurry and the line of the foam component are combined via a Y-shaped branched mixing tube and homogenized by a static mixer. A static mixer has no rotating parts. The mixing takes place through static obstacles, which cause turbulence in the components. The disadvantage is that the mixing in the static mixer cannot be adapted to a variable delivery rate. In addition, cleaning the static mixer turns out to be difficult, since material cannot be discharged from the static mixer when the pump is at a standstill. In addition, a rapidly hardening compound tends to stick to the complexly shaped obstacles in the static mixer, with areas behind the obstacles being difficult to clean even with water which is pumped through the static mixer under pressure.

the EP3145687B1 (also published as W02015176092A2 ) of the applicant shows a continuous mixing system comprising a vertical mixer and a horizontal mixer, which continuous mixing system is designed to enable thorough mixing of the slurry and foam and to prevent or reduce the adhesion of hardening material in the system. The continuous mixing plant is a complex device, the construction and commissioning at the place of use being associated with a corresponding effort.

One object of the invention is to facilitate the commissioning and ongoing operation of a continuous mixing plant.

The object is achieved with a system according to claim 1.

One solution according to the invention is that the system according to the invention is designed as a so-called plug-and-play unit, which is housed in a container, preferably in a modified commercially available steel container, in particular in a 15-foot container. Preferably, the container is only to be connected to a water and an electricity connection at the place of use in order to be ready for use. The container is in particular a transport container, which means that the system according to the invention is transported to the place of use in the container. The system is operated in the container in which it is transported and is permanently installed in this.

• - Wasseraufbereitung
• - Dosiervorrichtung für Feststoffe
• - Durchlaufmischer zur Herstellung eines Slurry aus den Feststoffen und einer Anmachflüssigkeit (Slurrymischer)
• - Schaumkanone
• - Durchlaufmischer für das Mischen des Slurry und des Schaums (Schaummischer)
• - Pumpe für das Pumpen des geschäumten Slurry zum Verwendungsort (Förderpumpe)

The following components are preferably contained in the container:

• - water treatment
• - Dosing device for solids
• - Continuous mixer for the production of a slurry from the solids and a mixing liquid (slurry mixer)
• - Foam cannon
• - Continuous mixer for mixing the slurry and foam (foam mixer)
• - Pump for pumping the foamed slurry to the place of use (feed pump)

• - Behälter für den geschäumten Slurry, welcher Behälter zwischen dem Durchlaufmischer für das Mischen des Slurry und des Schaums und der Pumpe für das Pumpen des geschäumten Slurry angeordnet ist
• - Abstreifrohr, zwischen dem Behälter für den geschäumten Slurry und dem Durchlaufmischer für das Mischen des Slurry und des Schaums
• - Behälter für Additive, welche Additive beispielsweise mittels Sauglanzen/Pumpen in den Mischprozess eingebracht werden
• - Bigbag-Halter
• - Schaltschrank
• - Bedien- bzw. Steuerungselement
• - Umschaltventil nach der Pumpe für das Pumpen des geschäumten Slurry

The container preferably also comprises one or more of the following components:

• - Container for the foamed slurry, which container is arranged between the continuous mixer for mixing the slurry and the foam and the pump for pumping the foamed slurry
• - Stripping pipe, between the container for the foamed slurry and the continuous mixer for mixing the slurry and the foam
• - Containers for additives, which additives are introduced into the mixing process, for example by means of suction lances / pumps
• - Big bag holder
• - Switch cabinet
• - Operating or control element
• - Switching valve after the pump for pumping the foamed slurry

The solids in the form of a cement matrix are preferably delivered to the plant in question in big bags. The solids are preferably provided (semi) automatically to the slurry mixer or the dosing device for solids with the help of a big bag holder. A funnel is preferably located under the big bag holder, at the lower end of which the metering device is arranged, which feeds the slurry mixer.

The big bag holder, the dosing device and the two mixers are preferably attached to a common support frame which extends vertically through the entire container.

The support frame can preferably have feet which extend below the container floor. This can advantageously be used to level the container.

The container can have rollers or can be placed on rollers in order to make it displaceable.

The support frame preferably has upper fastening elements which extend over the container roof and on which the big bag holder can be placed. The big bag holder is preferably releasably attached to the fastening elements in order to be able to be removed for the transport of the container.

The roof of the container has an opening in which the funnel is present, at the lower end of which the metering device is arranged. A device for cutting open a big bag is preferably arranged in the funnel.

The big bag is preferably hung with its carrying loops on the top on a suspension that can be removed from the big bag holder. The uprights of the big bag holder are mounted on steel springs, which means that the big bag is lowered by its own weight and is automatically raised when material is removed. In the funnel there is preferably a knife pyramid which cuts open the big bag.

By using contactors, contact sensors, position transmitters or position sensors on the posts, the filling level of the big bag can be measured by moving the big bag up and down. As soon as the big bag is empty, it can be replaced, whereby the system continues to operate with the bulk material in the hopper.

In order to prevent the development of dust, a rubber lip is preferably installed in the funnel, which surrounds the big bag.

The necessary additives are preferably supplied in barrels / canisters and introduced into the mixing process via suction lances / pumps.

Each additive is preferably introduced into the mixing process via a control valve so that the exact amount can be set, in particular controlled or regulated.

The manual control is preferably carried out from outside the container, preferably via an operating or control element that is present on the container but is accessible from outside the container. The operating or control element can preferably be pivoted, preferably between a first position which is located in the container and a second position which is at least partially outside the container. A switch cabinet or a control system for controlling the automated components of the system can advantageously be located in the container.

The operating element is preferably locked in the position outside the container and can only be swiveled into the interior of the container by an authorized person, such as a service technician. For this purpose, the operating element or the swivel element can be provided with a lock or similar locking mechanism.

In this way, a safe working environment can be guaranteed for the workers performing the work.

One object on which the invention is based is to further improve a continuous mixing plant with regard to foam quality and / or operational stability.

A solution according to the invention consists in the separate water treatment for the Mixing water from the continuous mixer and the water from the foam cannon.

For the water treatment for the mineral foam mixing plant, the water supply from a source is preferably divided into two lines. The division takes place in one line for the mixing water for the slurry and one line for the water for foam generation. In both strands, the amount of water can preferably be adjusted independently of one another. The amount of water is preferably controlled or regulated by a device or control system. In both strands, the temperature of the water can preferably be set independently of one another. The temperature of the water is preferably controlled or regulated by a device or control system.

The water or liquid source can be a line connection or a water reservoir of the system in question. The water storage tank can be filled at time intervals or continuously via a line connection, or it can be topped up by means of a tanker.

The water treatment system preferably comprises a pressure increasing pump in order to guarantee constant pressure and water quantity in the system. The pressure increasing pump is preferably arranged after the water source and before the division into the two lines.

The water treatment system preferably comprises a pipe separator which separates the supply line from the machine in the event of a pressure drop.

The water treatment system preferably comprises a cold water filter in order to avoid contamination of the system with solids.

The water treatment system preferably comprises at least one flow heater. The water treatment system can alternatively or additionally comprise at least one hot water tank (storage heater).

The water treatment system, in particular the flow heater, preferably enables different water temperatures for slurry preparation water and foam water, which subsequently influences the tightening or setting behavior of the mineral foam. This makes it possible to guarantee the same warm-up times for the mineral foam despite temperature fluctuations in the ambient air. If the ambient temperature is cold, warmer water is used. If the ambient temperature is warmer, colder water is used.

The temperature of at least one strand, preferably both strands, is preferably set, controlled or regulated as a function of the ambient temperature.

The hot water can be prepared after dividing the water into the two lines, in that each (or at least one) line has a flow heater or storage heater.

The hot water preparation can also take place before the water is divided into the two lines, each (or at least one) line having a mixer tap which has a connection for hot water and a connection for cold water.

The mixer tap can advantageously be used to set, control or regulate the temperature and quantity of the water in the respective line.

The water treatment system preferably also comprises a hot water filter in order to prevent the system from being soiled by lime loosening on the flow heater or on the storage heater.

The water treatment system preferably also comprises at least one thermostat in order to enable the water temperature to be set.

The foam mixer preferably includes a mixing tube, such as from the EP3145687B1 known.

To improve the delivery rate of the mixing plant compared to the mixing plant of the EP3145687B1 To increase it, it is proposed that the mixing tube be equipped with a second inlet for a foam cannon. This is preferably on the upper side, offset radially by approx. 90 ° to the first foam cannon inlet, which is located on the side of the mixing tube.

The system in question preferably has two foam cannons. The foam cannons are preferably each connected to the mixing tube of the foam mixer.

A stripping tube is preferably present between the container for the foamed slurry and the foam mixer.

The stripping tube is used to enable a transition between the mixing tube and the container for the foamed slurry, in particular in the form of a pump funnel. The scraper tube preferably has an external toothed ring which is connected to an electric motor is driven. In addition, the stripping tube comprises - preferably on the top - an internal stripping element, preferably in the form of a rubber lip. By rotating the scraper tube around its own axis, the inside is continuously stripped from the scraper element, thus avoiding packings in the scraper tube. Stripped material falls down onto the mineral foam moving in the lower area of the stripping tube and is transported with it to the inlet of the feed pump.

Preferably the system comprises a foam destruction lance which is used to reduce the waste volume of the mineral foam. This destruction of the foam pores is achieved by one or more air nozzles, which are mounted in a pipe section in a radial direction and directed towards the center of the pipe.

This foam destruction lance is either mounted at the end of its own hose line, or it is designed as a destruction station on an additional waste container into which the filling lance is inserted.

In another embodiment, the foam is destroyed by mechanical elements, preferably by rotating mechanical elements, for example by an impeller pump.

The system preferably comprises a switchover valve, in particular in the form of a 2-way valve. This valve is used to enable the use of only one pump to move the mineral foam on the one hand through the production hose line to the filling station and on the other hand to convey the mineral foam through the destruction hose line when the system is idle.

The valve preferably consists of two plastic plates which are connected to one another by an axis. The plate on the output side is screwed firmly to the container or the support frame and equipped with two hose nozzles (production and destruction hose line).

The entry side is provided with a hose nozzle and a toothed ring. The ring gear is required to enable the hose nozzle to be rotated by a drive in order to connect the hose nozzle on the inlet side to either the production line or the destruction line. A water nozzle, which is used to flush the destruction line when it is not in use, is preferably mounted on the plastic plate on the inlet side.

The production line is preferably designed as a hose line at least in one section and leads to a filling device.

The filling is preferably carried out in a concrete shell for the production of thermally insulated prefabricated structural elements.

The filling device preferably comprises a peeling bridge. While the mineral foam is being applied to the concrete shell, the foam is smoothed and leveled directly with a pull-off element, in particular a plastic broom. The puller element is attached to a bridge via a rotatable shaft and can preferably be rotated by means of a radio signal.

The axis is mounted on a "trolley" in order to be able to operate the entire length of the bridge.

Depending on the required insulation thickness, the height of the puller element can be adjusted and fixed in relation to the concrete shell.

The bridge itself preferably runs on rails on the table or, depending on requirements, can also run over a wall or ceiling system. One side can be guided on rails, the second side can be designed with free-running rollers.

For parts of the present continuous mixing plant, it is preferred if they are in accordance with the continuous mixing plant of the EP3145687B1 are executed. In order to identify these known device parts in the description, the relevant paragraphs of the description, the phrase "as from the EP3145687B1 known ”.

As from the EP3145687B1 known, solids and the mixing liquid are preferably mixed in a first vertically arranged mixer to form a flowable slurry, with an eccentric screw pump being attached to the lower end of the vertical mixing chamber, which conveys the premixed material from the first mixing chamber under pressure directly into the starting area of a second mixing chamber , wherein the second mixing chamber is preferably arranged at least approximately horizontally and has a rotating, horizontally arranged elongated mixing tool. The foam component is also conveyed under pressure via a foam cannon into the starting area of the horizontal mixing chamber, the slurry and the foam being moved through the horizontal mixing chamber, the mixing tool gently adding the foam component to the slurry. The amount of slurry and foam is preferably chosen so that the conveyance through the horizontal mixing chamber mainly due to the higher volume flow of the foam.

As from the EP3145687B1 known, the solids can be supplied by a screw conveyor which continuously conveys the solids from the lower end of a storage container to the upper end of the vertical mixer.

As from the EP3145687B1 known, the mixing tool of the horizontal mixer can consist of an elongated shaft on which elastically deformable mixing elements, preferably made of high-strength steel, are attached. These mixing elements are exposed to bending forces and vibrations during operation, which results in a change in shape of the flexible spring steel, which causes caking to loosen. This is particularly advantageous if the solids do not contain any coarse-grained particles which would otherwise contribute to the dissolution of caking.

As from the EP3145687B1 known, the ends of the mixing elements are preferably in contact with the inner wall of the mixing chamber, so that they continuously strip off the material adhering to the inner wall during operation. The mixing elements can be designed in such a way that all surface areas of the inner wall are stripped off with one rotation of the mixing tool. The mixing elements can be made from a 0.5 - 1.5 mm thick spring steel sheet and preloaded against the inner wall of the mixing chamber.

One object on which the invention is based is to further improve a continuous mixing plant with regard to foam quality and / or operational stability.

One solution according to the invention consists in the separate water treatment for the mixing water of the continuous mixer and the water of the foam cannon.

For the water treatment for the mineral foam mixing plant, the water supply from a source is preferably divided into two lines. The division takes place in one line for the mixing water for the slurry and one line for the water for foam generation. In both strands, the amount of water can preferably be adjusted independently of one another. The amount of water is preferably controlled or regulated by a device or control system, in particular electronically. In both strands, the temperature of the water can preferably be set independently of one another. The temperature of the water is preferably controlled or regulated by a device or control system, in particular electronically. Pressure regulating valves are preferably arranged in both lines to regulate the pressure under which the mixing water is introduced and to regulate the pressure under which the water is introduced into the foam cannons.

The motors of the device, in particular those that are involved in the process of mineral foam production and conveyance, are preferably monitored by a control unit, so that it is recognized if one of the motors should fail.

• 1: Zeigt die aus der EP3145687B1 bekannte Durchlaufmischanlage in seitlicher Teilschnittansicht.
• 2: Veranschaulicht eine bevorzugte Variante einer erfindungsgemäßen Anlage in Seitenansicht.
• 3: Veranschaulicht die erfindungsgemäße Anlage der 2 in Ansicht von oben.
• 4: Veranschaulicht die erfindungsgemäße Anlage der 2 und 3 in perspektivischer Ansicht.
• 5: Zeigt ein erfindungsgemäßes Abstreifrohr in perspektivischer Ansicht.
• 6: Zeigt das erfindungsgemäße Abstreifrohr der 6 im Längsschnitt.
• 7: Zeigt ein erfindungsgemäßes Umschaltelement in perspektivischer Ansicht.
• 8: Zeigt das erfindungsgemäße Umschaltelement der 7 in einer weiteren perspektivischen Ansicht.
• 9: veranschaulicht das erfindungsgemäße Wasseraufbereitungssystem.
• 10: Zeigt eine zur Kombination mit der gegenständlichen Anlage geeignete Abfüllstation in perspektivischer Ansicht.

The invention is explained by way of example on the basis of drawings relating to preferred design variants:

• 1 : Shows the from the EP3145687B1 Known continuous mixing plant in a partial sectional side view.
• 2 : Illustrates a preferred variant of a system according to the invention in side view.
• 3 : Illustrates the plant according to the invention of 2 in top view.
• 4th : Illustrates the plant according to the invention of 2 and 3 in perspective view.
• 5 : Shows a scraper tube according to the invention in a perspective view.
• 6th : Shows the scraper tube according to the invention 6th in longitudinal section.
• 7th : Shows a switching element according to the invention in a perspective view.
• 8th : Shows the switching element of the invention 7th in another perspective view.
• 9 : illustrates the water treatment system of the present invention.
• 10 : Shows a filling station suitable for combination with the system in question in a perspective view.

As in 1 can be seen from the EP3145687B1 known that from a storage container the solid powdery to granular solids with a conveyor 3 into the vertically arranged slurry mixer 1 be promoted. At the bottom of the slurry mixer 1 there is an eccentric screw pump 4th . The slurry mixer 1 has at least one water connection for introducing the mixing liquid, which can consist of water or water with various additives. The water connection is located below the feed opening for the solids, which prevents mixing water from getting on or into the conveying device 3 got. In the slurry mixer 1 the solids become one with the mixing liquid Flowable slurry mixed, which from the bottom of the slurry mixer 1 directly into the eccentric screw pump 4th got. The shaft of the vertical mixing tool has a connection to the rotor of the eccentric screw pump 4th on, so that the shaft and the rotor are driven by a common drive, in particular a motor. The eccentric screw pump 4th pumps the slurry directly into the horizontally arranged foam mixer 2 .

The slurry enters from above through the slurry inlet opening in the housing of the foam mixer 2 in its mixing chamber. Through one on the side of the foam mixer 2 The foam inlet opening is placed in the foam mixer with a foam gun 2 brought in. The slurry inlet opening and the foam inlet opening are in the front area of the mixer housing. The mixer housing is elongated and preferably has an annular cross section, that is to say is preferably shaped as a horizontal hollow cylinder. In the back of the foam mixer 2 the housing has an outlet opening through which the slurry mixed with foam leaves the continuous mixing plant. In the foam mixer 2 there is a horizontal blending tool. This consists of an elongated shaft which is provided with several mixing elements. The shaft can be on either side of the foam mixer 2 be stored in its housing. The horizontal mixing tool is driven by the motor and thus rotates around its own axis.

The inside surface of the foam mixer 2 is formed by a plastic tube. To the one in the foam mixer 2 To absorb or transmit occurring forces and moments, the plastic pipe is accommodated in a preferably three-part housing. The housing has a front section which has an opening for the slurry inlet, a bearing for the horizontal mixing tool and an opening for the foam feed. The housing has a rear section which has a bearing for the horizontal mixing tool. In order to transmit forces and torques between the two sections described, the housing has a central section which, preferably releasably, connects the two sections. The section is preferably formed by a linkage, for example three rods distributed over the circumference of the plastic pipe. The section can preferably have a trough-shaped support for the plastic pipe in order to prevent it from sagging even slightly. The rear section closes at the EP3145687B1 a conically widening rubber connection.

In 2 , 3 and 4th the system according to the invention is shown, which preferably has a slurry mixer 1 , a foam mixer 2 , a conveyor 3 and an eccentric screw pump 4th has which how to 1 and in the EP3145687B1 can be described in detail. The slurry mixer 1 is preferably arranged at least approximately vertically. The foam mixer 2 is preferably arranged at least approximately horizontally. The foam mixer is preferred 2 As seen in the transport direction of the mineral foam, arranged slightly sloping. This from the EP3145687B1 known device elements are together with other system components in a transport container 5 arranged, which is suitable to be transported by truck, train or ship. The transport container 5 is preferably a standard container. The length is preferably between 4 and 6 meters, the width preferably less than 2.5 meters, the height less than 3 meters, in particular less than 2.5 meters.

In the transport container 5 is a support frame 7th arranged, which extends over the entire height of the transport container 5 extends. The support frame 7th preferably has four posts, which are present at the corners of an imaginary rectangle. The posts are connected in the lower area and in the upper area by cross beams. In one variant, feet can be placed underneath the container floor 6th are present, which are inserted into the posts from below. The feet are preferred 6th height adjustable. The feet 6th can in particular be screwed into a threaded plate. In addition, additional feet can be attached below the corners of the container, or the corners of the container can be supported by supporting beams or wedges in order to relieve the container floor.

In an alternative design variant, the feet stand 6th of the support frame 7th on the container floor and are preferably screwed to this, the container floor at least in the area below the feet 6th is executed reinforced. For this purpose, steel profiles can be welded to the container floor.

The container wall is preferably reinforced with vertical struts, in particular on both sides next to the operating element 17th .

The container can be placed on rollers and moved in a known manner with a pulling tool.

In the container floor, hollow profiles are preferably provided, which are open on the long side of the container in order to be able to lift it with a forklift truck. The container is preferably modified so that the spacing between the hollow profiles is made narrower than in the case of a standard container.

The upper ends of the posts can protrude beyond the container roof. Alternatively, the upper ends of the posts can also be arranged flush with the container roof or below and made accessible through openings or a large common opening in the container roof.

The container roof is preferably completely removed so that heat can better escape from the interior of the container. Instead of the container roof, cross struts can be used which connect the side walls.

When transporting the container, the opening in the roof or the open upper side of the container is preferably closed with a tarpaulin.

A lattice door is preferably used at least on one broad side of the container. Lattice doors are preferably used on both broad sides of the container.

The respective grille door preferably has a contactor or sensor. The lattice doors can preferably only be opened while the system components are at a standstill.

The system preferably has a drive, for example in the form of a lifting cylinder, by means of which the slurry mixer and the foam mixer are decoupled, this drive being actuatable only when the grille door is open in order to be able to separate the two mixers for cleaning the mixing tools.

The motors of the two mixers are preferably pivotably mounted, with these being decoupled from the mixing tools when they are pivoted away. At least one of the motors, in particular that of the slurry mixer, is preferably pivoted with a drive, for example in the form of a lifting cylinder, this drive being actuatable only when the grille door is open in order to be able to separate the motor for cleaning the mixing tools.

In one embodiment variant, at least one of the two mixers, in particular the slurry mixer, has a sensor for detecting the position of the coupling piece of the mixing tool shaft. The motor of the respective mixer is preferably a servo motor. The decoupled motor is preferably controlled as a function of the position of the coupling piece, so that its shaft is aligned as a function of the position of the coupling piece. When moving, in particular pivoting, the servomotor towards the mixing tool, the motor shaft and mixing tool shaft are automatically coupled due to the position detection of the mixing tool and the alignment of the motor shaft.

In another embodiment variant, the shaft of the uncoupled motor is present with a known orientation and the mixing tool is oriented in accordance with this orientation before the motor is moved, in particular pivoted, in the direction of the mixer. To achieve this, the motor can always be stopped in the same position or orientation of its shaft when it is switched off. The alignment of the mixing tool (which has been removed, cleaned and reinserted, for example) can be carried out manually before the motor is moved towards the mixing tool, in particular is pivoted. This results in an automatic coupling of the motor shaft with the mixing tool shaft.

At the top of the support frame 7th is a mounting device 8th arranged. The holding device 8th can be removed, especially to enable the container to be transported by truck, train or ship. The holding device preferably comprises 8th a frame comprising four uprights. The uprights of the holding device are preferred 8th in the uprights of the support frame 7th guided. The upright of the mounting device 8th are connected at the upper end by a horizontal frame arrangement. The upright of the mounting device 8th can also be connected at the lower end area or in the middle area via a horizontally lying frame.

As in 2 illustrated, can in the uprights of the support frame 7th Spring elements 9 be arranged. Depending on the weight of the mounting device 8th and one of this held bulk goods container, it penetrates further (heavier) or less (lighter) into the support frame 7th a.

Are preferred on the mounting device 8th flexible bulk containers, especially big bags attached. For this purpose, the holding device 8th have eyelets or hooks at the upper end, on which the flexible bulk goods container is hung.

The holding device becomes due to the weight of the filled flexible bulk goods container 8th lowered until the bulk container is in the hopper 10 got.

If bulk goods containers are used which are not equipped with a constricted or otherwise closed and openable opening at the lower end, a device for cutting open the bulk goods container in the funnel is preferred 10 arranged, in particular a knife pyramid, as in 4th is recognizable. A grid can be arranged below the knife pyramid, which prevents large pieces or foreign bodies from getting on the conveyor 3 , especially a screw conveyor. If the device is to be set up outdoors, an additional roof and / or a housing can be placed over and / or around the mounting device 8th to be ordered.

At the top of the mounting device 8th can be arranged as shown rectangular hollow profiles around the mounting device 8th onto the support frame using a forklift truck 7th to be able to lift. Alternatively, the mounting device 8th also with a crane from the support frame 7th be lifted off. A big bag is preferably placed in the holding device 8th from the support frame 7th is lifted off and placed over a big bag placed on the floor or a platform. After the bigbag on the mounting device 8th was attached, this is back on the support frame 7th upscale. In another embodiment variant, there is the holding device 8th of two parts, with only the upper part, comprising the hollow profiles and the fastening means for the flexible bulk goods container, being lifted off. The hollow profiles and the fastening means are preferably present on a common frame element. The upper part or the lower part preferably has four centering cones, the respective other element having four corresponding openings. This facilitates the exact placement of the upper part on the lower part.

In a further development of the mixing tool of the foam mixer 2 , it is proposed according to the invention to provide the spring steel plates with a plastic coating.

A plastic coating or a plastic coating can advantageously also be applied to the inner wall of the container 12th are present. A plastic coating or a plastic coating can advantageously also be present on the inner wall of pipe sections of the conveying path of the mineral foam.

• - Elemente mit einer Ausrichtung parallel zur Förderrichtung, welche die Innenwand des Schaummischers 2 abstreifen.
• - Elemente mit einer Ausrichtung schräg zur Förderrichtung, wobei die Schrägstellung in der Drehrichtung des Mischwerkzeugs vorliegt,
• - Elemente mit einer Ausrichtung schräg zur Förderrichtung, wobei die Schrägstellung entgegen der Drehrichtung des Mischwerkzeugs vorliegt.

In one embodiment, the mixing tool of the foam mixer 2 have several mixing elements, in particular in the form of spring steel plates, which are present according to at least one of the following variants:

• - Elements with an alignment parallel to the conveying direction, which form the inner wall of the foam mixer 2 strip off.
• - Elements with an orientation inclined to the conveying direction, the inclination being in the direction of rotation of the mixing tool,
• - Elements with an orientation inclined to the conveying direction, the inclination being opposite to the direction of rotation of the mixing tool.

It is assumed that the elements with an inclined position in the direction of rotation of the mixing tool cause an accelerated transport of the foam, while the elements with an inclined position against the direction of rotation of the mixing tool cause a slowed transport of the foam.

The foam mixer preferably comprises 2 Elements with an alignment parallel to the conveying direction, which form the inner wall of the foam mixer 2 strip off and inclined elements of at least one of the versions mentioned. The foam mixer preferably comprises 2 both types of oblique elements. The foam mixer preferably comprises 2 all three types of elements.

In a further development according to the invention of the plant of EP3145687B1 is at the exit of the foam mixer 2 preferably a scraper tube 11 arranged.

Via the scraper tube 11 comes from the foam mixer 2 coming mineral foam in a container 12th , which is the pump funnel of a pump 13th can be.

In the container 12th or pump funnel, a stirring element is preferably arranged which continuously wipes off material from the container or funnel wall. The pump 13th is preferably a hose pump. The hose pump is preferably a rotary hose pump. The hose pump is preferably arranged with a horizontal hose guide.

The pump 13th sucks mineral foam from the container 12th and pumps it to a switching element 14th , which is preferably designed as a 2-way valve. At the first exit 15th of the switching element 14th a line can be connected to the filling point. At the second exit 16 of the switching element 14th a line can be connected to a waste container or a foam destruction device.

The system according to the invention preferably comprises an operating element 17th which is from the outside of the shipping container 5 is accessible. The control element 17th is preferably pivotable about at least one vertical axis. The control element 17th can be attached to a swivel arm and swiveled out of this through an opening in the container wall. The opening can be used for transport with the back of the control element 17th be closed, or by an additional door or flap, or another closure element. The control element 17th preferably has a contactor or a sensor which detects the position in which the operating element is located 17th is located.

In 5 and 6th is a preferred variant of the scraper tube 11 shown. This comprises a tube that can be rotated about its longitudinal axis 18th . The pipe 18th is preferably made of plastic. In the pipe 18th there is a scraper arm 19th , which is preferably in the upper part of the tube 18th is present. This is particularly preferably laterally offset to the upper apex of the pipe 18th . The direction of rotation of the pipe 18th is preferably opposite to the direction in which the scraper arm is arranged offset from the apex. The scraper arm 19th comprises a stripping element, which is preferably on the inside of the tube 18th is present. The pipe 18th is rotated around its own axis by a drive so that the fixed scraper element scrapes material from the inner wall of the pipe. As in 6th can be seen, the output-side end of the foam mixer protrudes 2 preferably in the interior of the tube 18th into it. It is preferred inside the tube 18th a warehouse 21 for the mixing tool of the foam mixer 2 provided which bearing on the housing of the foam mixer 2 or another fixed part of the system. The bearing can be in the form of a bearing plate. As shown, between the housing of the foam mixer 2 and the top of the pipe 18th there is a free space. A spray device is preferably located in this free space 22nd before which to the bearing of the mixing tool of the foam mixer 2 is aligned. The stripping element preferably runs in the longitudinal direction of the stripping tube 11 seen behind the camp 21 . The stripping tube preferably runs 11 from the foam mixer 2 starting at an incline downwards, preferably with a steeper gradient than the foam mixer 2 . The stripping element can for example be designed as a lip or a broom.

The foam mixer preferably has 2 an inner tube (in 6th not shown), which in the housing part 20th of the foam mixer 2 protrudes, which at least partially in the scraper tube 11 is present. The inner tube is preferably made of plastic. The inner tube can reach the bearing plate or the bearing 21 protrude, or preferably before this end. At least in the lower area is located between the pipe 18th and the housing part 20th a sealing element, for example in the form of a lip. The sealing element preferably runs around the entire pipe 18th , this being an opening for the spray device to pass through 22nd may have.

In 7th and 8th is a preferred switching element 14th shown. This has an input-side connection 23 on which the pump 13th is connected, preferably with a hose line. At the pump 13th it is preferably a peristaltic pump, since this has proven to be gentle on the foam structure of the mineral foam and, by squeezing the flexible hose, it prevents or reduces gripping of the mineral foam.

The connection on the input side is preferred 23 attached to a swiveling element, optionally with one of the two outputs 15th and 16 of the switching element 14th to be able to be connected. The pivoting of the input-side connection 23 preferably takes place with a drive, for example by means of a toothed ring, which is rotated by means of a motor. The two outputs could also be less preferred 15th and 16 be attached to a pivotable or slidable element to alternate with the input-side connection 23 to be able to be connected. The connection on the input side can be less preferred 23 also be attached to a sliding element.

At one of the two exits 15th and 16 a line is connected to the filling point for the mineral foam. At the other exit 15th or 16 a line is connected to a waste container. At the filling location, for example on a manually operated filling lance, there is preferably a switch or a button or another suitable operating element, such as a lever, via which filling can be stopped or started. The control element for filling can be on a portable device. The control element 17th can have an operating element or an operating function for starting and stopping the foam feed at the filling location.

The switching element is preferred at each stop of filling 14th automatically actuated so that the entrance 23 with the exit 15th , 16 is connected, which leads to the waste container.

It is preferably located between the switchover element 14th and the waste container, a foam destruction device which destroys the air bubbles of the foam transported to the waste container to reduce the volume of waste.

An impeller pump has proven to be suitable as a foam destruction device.

The foam is preferably conveyed into a container on the inlet side of the impeller pump, a water inlet also opening into the container. The water inlet is preferably aligned with the foam inlet of the container, so that the inflowing water, in particular in the form of a jet, hits the foam entering the container. The container is preferably closed by a removable lid.

The switching element can preferably 14th have a water connection to the pipe to the waste container after it has been used. In one embodiment, the water connection can also be used to flush the production line, in particular if the filling of the mineral foam is interrupted for a longer period of time.

9 schematically illustrates a preferred embodiment of the system for water treatment, whereby the person skilled in the art basically has many ways open to provide the mixing water for the slurry mixer and the water for producing the foam in separately adjustable amounts and temperatures as provided according to the invention. The system includes a source of water 24 which can be present as a tank or as a connection to a water supply network. The system optionally includes a booster pump 25th . The system comprises at least one device for generating hot water, for example a water heater 26th . In addition, the system comprises at least two devices for setting, controlling or regulating the water temperature and quantity, for example in the form of at least two mixer taps 27 , 28 , in particular in the form of thermostatic mixer taps. Any mixer tap 27 , 28 has a connection for hot water of the device for hot water generation and a connection for cold water from the water source 24 or the booster pump 25th on. The water of a first mixer tap set in terms of quantity and temperature 27 is used as mixing water in the slurry mixer 1 directed. Additives can be added to the mixing water, for example by means of a suitable device (e.g. suction line, pump) in the line between the mixer tap 27 and slurry mixer 1 be introduced. The water can also be provided with additives in an intermediate container and then in the slurry mixer 1 be initiated.

The quantity and temperature of the water from a second mixer tap 28 is at least one device for generating foam, for example a foam gun 29 fed. For example, a surfactant or protein foam is produced. As shown, at least two devices for generating foam, for example two foam cannons, are preferred 29 available. As shown, these can come from a shared mixer tap 28 be fed. In another variant, each foam cannon 29 a mixer tap 28 be available, so that the amount and temperature of the water of the foam cannons 29 can be set, controlled or regulated independently of one another. As shown, the foam lines of the foam cannons open 29 each at independent positions at the front end of the foam mixer 2 in these. The first foam inlet is preferably located on the side of the mixer housing in the longitudinal area in which the eccentric pump is located at the upper end 4th is present. The second foam inlet is preferably located at the top of the mixer housing, viewed in the longitudinal direction of the mixer housing, after the longitudinal area where the eccentric pump 4th is present. Compared to the introduction with only one foam gun at only one point, this variant has proven to be advantageous, among other things, due to the improved mixing and the higher throughput.

In another embodiment variant, at least one foam inlet is located in front of the inlet for the slurry, as seen in the transport direction of the foam mixer. The foam mixer is advantageously first filled with foam and the slurry is mixed with the foam in a section located behind it. This prevents or reduces slurry, and thus hardening material, from reaching the end of the mixer housing on the motor side. Both foam inlets preferably open into the interior of the foam mixer before the inlet for the slurry.

In one embodiment, the switchover element is 14th does not exist and at the filling location the production line is placed in a waste container or a foam destruction device if filling into the components to be filled is briefly interrupted.

In that variant with switchover element 14th it is preferably provided that this automatically switches from the destruction line back to the production line after a predefinable period of time (depending on the curing time), since otherwise the material in the production line would harden. The switchover is preferably announced by means of an alarm. The transport of foam through the destruction line takes place preferably only during breaks, for example when changing from one element to be filled to the next. In one variant, the transport through the destruction line can only take place until the operator has placed the production line in a waste container or a foam destruction device.

In an alternative embodiment variant, the production line can be flushed after a predefinable period of time. In an alternative embodiment variant, the entire system can be stopped and flushed after a predefinable period of time.

The operator can preferably choose between the pause mode with foam destruction and a system stop with stopping the material feed and rinsing the system with cleaning fluid, especially water.

In 10 is a preferred filling station 30th shown, which is suitable for use with the mineral foam system according to the invention. Of course, the present invention can be used on or with any filling station. The filling station described 30th is advantageous for large components to be filled such as parts of prefabricated houses. The filling station 30th comprises a filling element 31 , for example in the form of a filling lance, which is connected to a hose line at one of the outputs 16 , 15th of the switching element 14th connected. The filling station 30th comprises a peeling bridge comprising a receiving element 32 , to which a peeling element, not shown, is attached. The receiving element preferably has 32 a vertical axis 37 on, about which the peeling element can be rotated or pivoted. The rotary or pivoting movement is preferably carried out driven by a motor. The rotary or swivel movement can be carried out by programming via a control system, or by remote control by a user.

The receiving element 32 is on a traverse by means of a trolley 33 attached with the trolley along the traverse 33 is movable. The traverse 33 is due to at least two supports 34 , 35 before, which can be moved transversely to the direction of travel of the trolley. Both supports 34 , 35 preferably have roles. At least one of the supports 35 is guided on a rail so that a fixed alignment of the extraction bridge is maintained. The second support 34 Can be freely on the hall floor 36 be led.

The distance between the supports 34 , 35 is preferably adjustable. This is preferably done by the freely guided support 34 is raised and along the traverse 33 is proceeded.

When filling, the filling element 31 guided over a component shown in dashed lines in order to fill it with the mineral foam. The height of the peel bar in relation to the floor or the traverse 33 is adjustable so that it can be adapted to the required fill level of the component. The filling of the component with mineral foam and the spreading and smoothing of the mineral foam with the pull-off strip preferably take place at the same time, in that the filling element 31 , along a manually selectable or programmed path over which the area or opening of the component to be filled is guided and the peel bar follows the path of the filling element 31 is tracked.

In 11 is an advantageous variant of the inlet to the pump 13th , in particular peristaltic pump shown. As already described is in the container 12th or pump funnel, preferably a stirring element is arranged, which continuously wipes off material from the container or funnel wall. As in 11 illustrated the stirring element is driven by a motor. In the variant of the 11 the motor also drives a helical element, in particular a helical spring 38 at. The feather 38 can be attached to the stirring element. The feather 38 extends into that pipe section which is between the container 12th or pump funnel and the hose of the peristaltic pump extends. The mineral foam tends to adhere to this rigid pipe section of the system. The spring rests against the inner jacket of the pipe section over its entire circumference. By the rotating spring 38 the inner wall of the pipe section is continuously painted over, thus preventing material from sticking and hardening. The feather 38 or the helical element has no soul. The feather 38 is preferably the suction side or the outlet side of the pump 13th arranged and therefore does not serve to transport the mineral foam.

In 12th and 13th Another embodiment of a device for preventing mineral foam from adhering in a pipe section of a conveying line is shown. The pipe section has an internal elastic hose 39 on, being through a connector 40 a pressurized medium (compressed air or liquid) between the hose 39 and the pipe can be inserted so that the hose 39 lifts inwardly from the inner wall of the pipe section. The space between the inner wall of the pipe section and the hose is preferred 39 tightly closed to the inside of the pipe. As shown, the hose 39 at least one end or both ends of the pipe section be slipped around the jacket of the pipe section in order to achieve a tight fit. The outboard section of the hose 39 can for example be fixed to the pipe with a pipe clamp, a cable tie or a comparable element. The connection 40 is preferably on the outside of the tube.

As in 12th is shown, the input side of the pump 13th present pipe section with an inner tube 39 be executed. The funnel-side end of the hose 39 can be found on the inside of the funnel or container 12th be moored.

As in 13th is shown, the output side of the pump 13th present pipe section with an inner tube 39 be executed.

14th shows an alternative arrangement of a mounting device 8th , which next to the transport container 5 can be set up. In this case it is below that of the mounting device 8th The bulk container held a further funnel 41 arranged, of which material with a further conveyor device 42 in the funnel 10 of the transport container 5 is promoted. It is preferred for this transport container 5 still possible the mounting device 8th on the transport container 5 to be placed in the uprights of the support frame 7th , which is in the transport container 5 is present. The bulk material can also be made available in other ways, for example by means of a conveying device that transfers material from a container, silo or store into the funnel 10 promoted.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 19843777 C1 [0006]
• EP 0120812 A2 [0006]
• WO 9615889 A1 [0006]
• CN 209755551 U [0007]
• CN 203449434 U [0007]
• CN 201249476 Y [0007]
• DE 102019122041 A1 [0008]
• DE 3100443 A1 [0009]
• DE 3629674 A1 [0010]
• WO 2011044604 [0010]
• WO 2011106816 A1 [0011]
• EP 1065033 A2 [0012]
• DE 2437231 A1 [0013]
• DE 3807250 A1 [0014]
• DE 4408088 A1 [0015]
• EP 3145687 B1 [0016, 0051, 0052, 0068, 0069, 0070, 0071, 0072, 0077, 0078, 0080, 0081, 0107]
• WO 2015176092 A2 [0016]

Claims (18)

Plant for producing a mineral foam, comprising a dosing device (3) for solids, a slurry mixer (1) for mixing the solids and a mixing liquid to form a slurry, at least one foam producing device for providing a foam, a foam mixer (2) for mixing the slurry and the Foam to a mineral foam, a pump (13) for pumping the mineral foam, the slurry mixer (1) and the foam mixer (2) being designed as continuous mixers, characterized in that the system is arranged in a transport container (5) and operated in this will. Plant after Claim 1 , characterized in that a system for water treatment is also arranged in the container, which system separately provides the water required for the slurry mixer (1) and the at least one foam generation device, the temperature of the water for the slurry mixer (1) and the at least one foam generation device can be set, controlled or regulated independently of one another. Plant according to one of the Claims 1 until 2 , characterized in that a switching element (14) is also arranged in the container, which is located after the pump (13) and which connects the output of the pump (13) via a first output (15) of the switching element (14) with a line to a Filling station connects and connects via a second output (16) of the switching element (14) to a line to a waste container. Plant according to one of the Claims 1 until 3 , characterized in that the foam mixer (2) is followed by a scraper tube (11), this comprising a tube (18) which rotates around its own axis and has a stationary scraper element which is located inside the tube (18) and mineral foam strips off its inner surface. Plant according to one of the Claims 1 until 4th , characterized in that a container for the mineral foam is arranged after the scraper tube (11), from which container the pump (13) draws in the mineral foam. Plant according to one of the Claims 1 until 5 , characterized in that an operating element (17) for controlling the system is arranged on the outside of the transport container (5). Plant after Claim 6 , characterized in that the operating element (17) can be pivoted into the transport container (5). Plant according to one of the Claims 1 until 7th , characterized in that there is a support frame (7) in the transport container (5) which extends at least from the container floor to the container ceiling. Plant according to one of the Claims 1 until 8th , characterized in that the transport container (5) has a support frame (7) to which at least the slurry mixer (1), the foam mixer (2) and the metering device (3) are attached. Plant according to one of the Claims 8 until 9 , characterized in that the transport container (5) has at least one opening above the support frame (7) and a mounting device (8) is detachably placed on the support frame (7), the mounting device (8) carrying a bulk material container for the solids. Plant after Claim 10 , characterized in that there is a funnel (10) below the holding device (8), via which funnel (10) the solids reach the dosing device (3) from the bulk material container. Plant according to one of the Claims 10 until 11 , characterized in that the mounting device (8) is supported variable in height in the support frame (7), the mounting device (8) being moved further out of the support frame (7) the lighter the bulk goods container is. Plant after Claim 8 , characterized in that the support frame (7) comprises four uprights, the uprights being attached to the container floor and the container floor being reinforced in the area of the uprights. Plant after Claim 10 , characterized in that the support frame (7) comprises four uprights, the mounting device (8) also comprising four uprights, the uprights of the mounting device (8) being guided in the uprights of the support frame (7). Plant according to one of the Claims 1 until 14th , characterized in that two foam generating devices are attached in the transport container (5) which feed foam at different points into the foam mixer (2). Plant according to one of the Claims 1 until 15th , characterized in that the pump (13) is a hose pump. Plant according to one of the Claims 1 until 16 , characterized in that it comprises a pipe section which has an internal elastic hose (39), with a Connection (40) a pressurized medium can be introduced between the hose (39) and the pipe. Plant according to one of the Claims 1 until 17th , characterized in that it comprises a pipe section, a helical element (38) being present in the interior of the pipe section which can be set in rotation by a motor.

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