DE2404367A1 - METHOD AND EQUIPMENT FOR PRODUCING PRE-FABRICATED CONCRETE - Google Patents

Description

DIPL.-ING. A. GRÜNECKER

DR.-ING. H. KINKELDEY

-DR.-ING. W. STOCKMAIR, Ae. E. _IC on inst.optechn.)

PATENT LAWYERS

8000 MDNCHEN 22

Maximiiianstraße 43 Telephone [08 Π) 22 28 62 (4 lines) Telegrams Monapat Munich. Telex 05-29380

January 30, 1974 PH 7661-21 / rb

Mr. Or. Gerhard Hudelmaier 79 Ulm / Donau, Frauenstr. 22nd

Method and device for producing Manufactures) et on

The invention relates to a method for producing ready-mixed concrete, in which cement, aggregates and water dosed and separately filled into at least one intermediate container according to reactive components, mixed and brought to the construction site in ready-mix concrete mixers.

Usually, ready-mixed concrete is produced in plants with stationary compulsory mixers, the compulsory mixers are charged with dosed components for the concrete and the ready-mixed batch in a ready-mixed concrete mixer filled and immediately supplied for use. These methods generally have the Disadvantage that the mixer takes up the capacity of the system

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Bank accounts: H. Aufhäuser, Munich 173533 Deutsche Bank, Munich 1 fi / 25073 Post check account Munich 46212-801 BLZ 70030600 BLZ 700 70010. '"· BLZ 70010000

are correct, and cause high wear and energy costs. Since the ready-mixed concrete cannot be stored, the known methods also have the disadvantage that the the need for concrete that usually occurs intermittently must also be satisfied in intermittent fashion. On the one hand, this leads to very uneven surfaces Utilization of the production facilities with alternating hectic or breaks in work, on the other hand long waiting times for the ready-mixed concrete mixer in burst operation. The latter again results in an unfavorable utilization of the high-quality vehicles.

A device is known (DT-PS 1 584 394) at which ira course of the process all components necessary for a concrete batch simultaneously on a single one Can be dosed in an intermediate container. This intermediate container has chambers in which water, cement and aggregates are to be stored separately from each other. ■ The intermediate container is part of the balance. After graduation of the weighing process. the intermediate container is opened and the components are added to the existing one at the same time stationary mixer supplied. The "known device has the purpose of simplifying the weighing process, in particular a single scale for all components instead of several individual scales for aggregates, cement and Water to use. The method that can be carried out with it, however, has the same disadvantages as those in general above were honored: The intermediate container can only be emptied when the mixer is ready to receive and immediate use of the mixture is possible. The intermediate container, i.e. the scales, can only be used after it has been emptied of the Zwischenbeliälters to compile the Components can be used again for the next batch.

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In contrast, the present invention has the object. ■ to develop a method of the type described above, a more even workload on the one hand and a faster and more economical delivery of concrete, especially during rush hour.

The object is achieved according to the invention in that a plurality of intermediate containers filled with metered components are provided and each intermediate container is emptied directly into a ready-mixed concrete mixer.

The method according to the invention has the essential advantage that a number of concrete batches in the form of components that have been matched to one another in terms of quantity, but not mixed can be prepared and kept in stock, and that furthermore no stationary compulsory mixers are required will. It has been shown that sufficient mixing of the components in the transport concrete mixer can be achieved can. The intermediate containers can be used with any Time to be topped up or Concrete is needed. In this way, the filling and metering devices are used economically without on the one hand Work overload, on the other hand, breaks occur. The number of intermediate containers to be provided is appropriate adapted to the number of ready-mixed concrete mixers in use so that even in burst operation, i.e. if a large part of the ready-mixed concrete mixer should be filled almost simultaneously, no or no significant waiting times attack. This results in a more economical use of the transport vehicles, as the compulsory breaks are no longer necessary. The performance of the system will be the same Number of concrete mixers increased or it

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can save vehicles xverden. It is also essential the energy savings, since the entire batch is poured into the ready-mixed concrete mixer at once and with it the long ones Rotation times while standing can be avoided. The port case the stationary compulsory mixer also means significantly less wear and tear and greater operational reliability / V / eil the vulnerable aggregates are missing, as well as considerable energy savings. Additionally results a lower investment requirement, since the acquisition of a number of intermediate containers is less expensive, than setting up stationary compulsory mixers. Furthermore, the intermediate containers have a service life that many times the service life of compulsory mixers with their numerous moving elements.

A particularly good and quick mixing result can be achieved by using ready-mixed concrete mixers, which are equipped with compulsory mixing tools. With these types of concrete mixers, additional energy can be generated save, as the mixture is essentially completed during the filling process and the drum does not have to rotate continuously during transport. In addition, the ready-mix concrete mixer makes the concrete directly on the Construction site finished, expensive transfer devices are saved.

The invention also provides a device for carrying out the method. Based on existing facilities with devices for filling and / or dosing cement, water and aggregates, with transport concrete mixers and at least one filling station for the transport concrete mixer, it is characterized by a plurality of intermediate bins and storage spaces -for these, such as by conveyors for the components and / or the organs of the filling and / or metering devices and / or the intermediate containers. Any existing

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The system can thus be transformed into a device according to the invention in a simple manner. Depending on your conception as a star, pocket or high storage system, as well as the available space, the components can be directly or indirectly fed to the intermediate containers and their contents emptied into the transport concrete mixer. The intermediate containers can be arranged on stationary parking spaces, one or more conveying devices leading to the individual stations adjustable, and each parking space of the intermediate container as a filling station for the Concrete mixer be designed. This arrangement is particularly economical in relation to existing ones Systems adaptable. The fixed installation of the intermediate container only requires a St ^ II or Support arrangement at a height that enables the Transport concrete mixers can move under the intermediate containers. Must be mobile

according to this arrangement only conveyors, either direct slides or pipes for the individual Components adjustable to optionally iodine Can load intermediate containers, or also optionally adjustable conveyor lines for organs of the filling devices, for example buckets. Conveyor equipment or transport devices that are present in existing systems, can thus still be used if the device is appropriately designed. A simple and space-saving embodiment of a • facility with stationary intermediate containers provides that the intermediate containers are arranged on a frame in the shape of a ring segment that the center of the Ring coincides with a cradle and at least

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a conveyor is adjustable to guide radially from the weighing frame to each intermediate container. These Arrangement has the advantage that the conveyor only when changing from one intermediate container to the other rotated, does not have to be adjusted. Their inclination can remain unchanged, as can their length. Another The main advantage of the ring segment arrangement is that each intermediate container from the outside, so the larger circumference side, can be easily approached by a concrete mixer.

In another embodiment, the intermediate containers Stationary arranged in a straight line and the conveyor device or devices displaceable like a bridge on the one hand on the frame for the intermediate containers, on the other hand on a rail in front of the filling station be slidably mounted.

The organs dex 'filling and / or dosing device can For the simultaneous transport of all components divided into chambers, these corresponding to the chambers of the intermediate container be arranged and each provided with a corresponding dispensing opening. The organ, for example a transport bucket, thus conveys all components to the relevant intermediate container at the same time. The handover of all components also takes place at the same time. The delivery and filling times are based on this In a rational way, especially if a number of dosing devices, for example scales, have a corresponding one Number of transport tubs can be filled approximately at the same time.

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In another embodiment of the device are the intermediate container is designed to be movable and at least one at the filling and / or or metering device for the conveying path for the intermediate containers intended. Each intermediate container can drive past one or more filling or metering devices and record the individual components. At the same time, this facility offers the possibility of Move the intermediate container to one or more filling stations for the transport concrete mixer. It doesn't have to more all parking spaces for the intermediate containers for the transport concrete mixer will be accessible.

In another embodiment, at least one is Conveyor device for components and / or organs for filling stationary between the filling and / or dosing device and a filling point for the intermediate containers, and the intermediate containers are on at least a train to and from the filling station. Such a device is particularly difficult to make Adjust space conditions. The conveying devices do not need to be stored in a portable manner. The pitches for the intermediate containers, they can all be designed as a filling station for the transport concrete mixer or there can be only one, or a few, of the Zx ^ ischenbehälters accessible filling station be provided.

The track for the intermediate containers is advantageously at least partially two-lane with transition points. If the path for the intermediate containers does not form a closed curve, this is at least partially possible two-lane training to provide the full container for loading the concrete mixer and the empty intermediate containers of a filling point

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to feed without them hindering each other, "or stop in the charging process.

The conveyor systems for the organs of the filling and / or metering devices can be at least partially two-lane for simultaneous conveyance in both directions be trained. With the second lane as an alternative route, the loading speed can be doubled, since each one is empty Organ can move back while a new full organ is underway. Two lanes, or with an alternative point provided, can not only stationary, but also parallel displaceable or radially movable conveyor systems be trained.

In an advantageous further development of the invention There is a facility at every parking space or every intermediate container with the drum of a transport concrete mixer arranged in the area of their filling opening couplable filler neck. It enables all of the content of the intermediate container can be emptied quickly and without loss into the interior of the drum. This shortens the filling time. The consequence of this is a better utilization of the ready-mix concrete mixer and the saving of valuable energy, • because the filling rate is synonymous with the rotation time of the drum when the transport vehicle is stationary.

The drum of the transport concrete mixer can be particularly advantageous Have catching organs for automatic coupling with the filler neck. The concrete mixer moves Appropriate * approach to the filler neck, the catching organs couple and the filling process can begin at the same time. Further time and labor savings are the consequence.

The inventive method is based on a Heihe of embodiments of devices explained. Show it:

Pig. 1 is a schematic side view of a device for filling intermediate containers;

FIG. 2 shows a plan view of the device according to FIG. 1;

Fig. 3 is a plan view of another embodiment a device according to FIG. 1;

Fig. 4- another embodiment of a device according to FIG. 1;

■ Fig. 5 shows a side view of a further embodiment of a device with a filling station for a concrete mixer;

6 is a schematic side view of another Embodiment of a device for filling intermediate containers;

Fig. 7 shows the plan view of the device according to Fig. 6;

FIG. 8 shows the plan view of a modified device corresponding to FIG. 6; FIG.

9 shows a schematic side view of a further embodiment of a device for filling Intermediate containers;

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Pig. 10 is a plan view of the device according to FIG. 9;

11 shows a schematic side view of a further embodiment of a device for filling of intermediate containers;

FIG. 12 shows a plan view of the device according to FIG. 11;

FIGS. 13 a schematic side view of a further embodiment of a device for filling of intermediate containers;

FIG. 14 shows a plan view of the device according to FIG. 13;

15 shows a further embodiment of a device for filling intermediate containers;

FIG. 16 shows a plan view of the device according to FIG. 15; and

17 shows a schematic, partially sectioned side view a mixing drum of a transport concrete mixer.

In all figures, devices, organs and objects are essentially the same Denoted by reference numbers.

1 to 5, a star-shaped storage system 1 for aggregates is different in the right part of the drawing Grain, such as sand and gravel, drawn with a removal opening 2. Yours is a scraper 3

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assigned. In the area of storage facility 1 there are also two Cement silo s 4- provided, of which a filling line 5 to a schematically illustrated filling and / or metering device 6, one of several, leads. A bucket in a large chamber 7a and two smaller chambers 7b and 7c is subdivided (Mg. 3) can there with cement, aggregates and water can be filled in certain quantities. Each of these components is in one of the Chambers filled. Each chamber has its own closure element. Opposite the storage facility 1 is a frame 8 constructed, which, as Fig. 2 shows, arranged in the shape of a ring segment is. It has a number of parking spaces 9 mill? stationary intermediate container 10. The parking spaces are designed so that the lower area of the intermediate container, especially the floor area, protrudes freely downwards. Furthermore, the frame 8 is designed so that a Concrete mixer 11 (Fig. 5) can approach each parking space so far that it contains the contents of the intermediate container s can take over in its drum 12. In the illustration according to FIG. 5, this is done with the aid of a filler neck 13, which is arranged on the parking space or on the intermediate container. The drum 12 of the transport concrete mixer 11 has catch organs 13a, with x ^ elchen it catches the filler neck 13 when approaching and after Releases filling again. The same arrangement also applies to Figs. 1 to 4 ·. The frame 8 also has a barrel rail 14- on. It runs on its surface in the area of its inner area facing the storage facility 1 Top edge.

Each, intermediate container 10 has a large chamber 10a, as well as zv / ei smaller chambers 10b and 10c. Their spatial allocation corresponds to the allocation of the chambers in

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Bucket 7 in such a way that an above the intermediate container 10 located-bucket 7 the contents of its individual chambers separately in the corresponding chambers of the intermediate container can drain. The large chamber of the intermediate container and the bucket are the smaller chambers for holding aggregates such as gravel and sand for the recording of I-Jasser. or. Definitely cement.

A conveying device 13 for the buckets 7, designed here as an inclined elevator, is mounted with its lower end below the filling and / or metering device by means of a pivot bearing 16. The upper region of the conveying device 15 is supported displaceably on the running rail 14 by means of a carriage 17. It extends so far over the surface of the frame 8 that the bucket 7 with its chambers can be brought exactly over the three chambers of the intermediate container 10. The conveyor device 15 can be rotated around the pivot bearing 16 as viewed by the double arrow A (FIG. 2), the drive running on the running rail 14.

The described device according to FIGS. 1 and 2 enables the following method for the production of precast concrete: The conveying device 15 is brought into a position by rotating around the pivot bearing 16 in which its upper area is located above an empty intermediate container 10. At the filling and / or dosing device 6, the bucket 7 is charged with components that are matched in terms of quantity, with one or more additives being filled into the large chamber 7a, cement and water in the small chambers 7b or 7c intended for this purpose. The conveyor device 13 transports the bucket 7

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upward in such a way over the intermediate container 10 that the chamber 7a of the bucket is above the chamber 10a of the intermediate container, the chambers 7ΐ> and 7c above the chambers 10b and 10c (Fig. 1 shows the bucket 7 once in the lowest and once in the top funding position). The contents of the bucket 7 are emptied into the corresponding chambers of the intermediate container by opening the closure elements (not shown) of the bucket chambers. The empty bucket 7 is brought back to the filling and / or metering device and reloaded with components. This process is repeated until the amount of aggregates, cement and water required for a specific batch of concrete is stored in the corresponding chambers of the intermediate container. This means that the components separated by the fireplace walls are ready to be transferred to a concrete mixer. The conveyor 15 is now rotated so that its upper area is above another ₍ empty intermediate container, whereupon this intermediate container is filled in the manner described. This is repeated as long as there are empty intermediate containers on the frame 8. As soon as at a construction site Concrete is required, a transport concrete mixer moves in the manner shown in Fig. 5 under a parking space 9 of the frame 8. While its drum 12 begins to rotate, the contents of the intermediate container 10 located at this parking space is successively or simultaneously through the filler neck through its bottom 13 is emptied into the drum. The components are immediately mixed by the rotation of the drum. The transport concrete mixer can be provided with a forced mixing tool 18, which is explained in more detail with reference to the figure at the end of the description The mixing process is completed Trombe! Content even during the transport to the construction site by occasional

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or kept rotating the drum in a mixed state. Other ready-mixed concrete vehicles can At any time, even at the same time, drive under other parking spaces with filled intermediate containers and be filled. Every empty mixing container under which there is no concrete mixer can immediately be returned to the be filled with the components for a concrete batch as described.

Fig.5 shows a system, the facility of which differs from the according to Fig.l and 2 only differs in that two conveyors 15 are present. Both are on a single pivot bearing 16a arranged so that it, like the single conveyor 15 in Figure 2 in the direction of the double arrow A can be rotated back and forth, whereby they are also each with a drive on the Support running rail 14. The side view of the embodiment according to Fig. 3 coincides with the embodiment Fig.l, with actually two buckets 7 are present, one on each conveyor 15 · This facility enables the same procedure as was described for the system according to FIGS. 1 and 2, only that two at a time Intermediate containers can be filled at the same time. Each of the conveyors can have a straight empty intermediate container can be rotated. Alternately The filling of the buckets can be controlled in a simple manner by the fact that the bucket of a conveyor device is always at the bottom, when the other is on top and vice versa.

Fig. 4 shows another, corresponding in the side view Fig.l Furnishings. It differs from the device according to FIG. 2 only with regard to its conveying device 15b by the fact that this has a Part of the conveyor line is two-lane. One of the

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two tracks, 15b ¹ is intended for upward conveyance (arrow B), the other track 15b ″ for downward conveyance (arrow C). Otherwise, the conveying device 15b is designed analogously to the conveying device 15 in FIG. Fig. 4 shows the two buckets 7 in their end positions, one below, one above, with out. drawn lines. It also shows the two buckets 7 in dash-dotted lines during their encounter, one being ^{conveyed up on track 15b 1} and the other being conveyed down ^{on track 15b 1 '.} The process with this system is as described, the speed of fall for an intermediate container is only doubled, since two buckets can be constantly in motion. Depending on the design of the conveying device, one of the two tracks can also be assigned to a specific bucket, which can move up and down on it, so that the two tracks form an escape point.

FIG. 5 shows the schematic side view of a system which essentially corresponds to FIGS. 2, 3 and 4-, ie the conveyor device designated by 15c in FIG. 5 can be one or two-lane, or two conveyor devices can be provided. The difference lies in the shape of the frame 8a, which has a roof 19 over the parking spaces 9 in a different configuration of its supports. Furthermore, the device is equipped with buckets 7 ¹ without chambers, in which the bucket is tilted for emptying. Di? For the sake of clarity, the tilting device is not shown in FIG. 5, however. With this device, the components must be conveyed individually and filled into the relevant chambers of the intermediate container. In addition, FIG. 5 shows two operations of the method: emptying a bucket 7 ¹ with

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Aggregates in the chamber 10a an intermediate container and emptying an intermediate container into a transport concrete mixer 11. These two operations usually found according to the invention Proceedings do not take place at the same time.

In Figs. 6, 7 and 8, the frame S with the Parking spaces 9 and the running rail 14, as well as the Intermediate container 10 designed as in the figures described so far. On the right, however, is a high collecting container 20 available, the several chambers 21 for various aggregates, as well as cement and possibly Has water. The high-level collection container 20 is fed by means of an inclined conveyor 21, d.Her is only indicated schematically in Figures 6 to 8. It can be a well-known conveyor Type of construction, for example a bucket conveyor or elevator ^ act. The inclined conveyor 21 is loaded with the components he is promoting a displaceable cross conveyor 22, which in a known Ueise the conveyed material is optionally transported into one of the chambers 21. On one of the high collecting container 20 carrying Tower 23 is, by means of a pivot bearing 16b, a conveying device 15d for buckets 7 around a vertical axis rotatably mounted. The conveyor lfr-d is supported by means of a drive 17 on the running rail 14, and is thereby to be adjusted so that its end is in each case above a mixing container 10. The effects way of the conveyor 15d is analogous to that 'Mode of operation of the conveying device 15 according to FIG. 1, with only the conveying direction of the full bucket downwards and the return of the empty bucket upwards

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goes. Each bucket is filled on the underside of the high-collecting container, the contents of each chamber 21 being drawn off into the bucket 7 via a metering device (not shown) on the underside of the high-collecting container. The "procedure otherwise proceeds as described above, the chambers of each intermediate container are filled via the conveyor 15b and, if necessary, emptied into a transport concrete mixer. FIG. 6 shows the system with two conveyor 15d, FIG. 8 a conveyor 15 © "the analog of the conveyor 15b in FIG. 4 two tracks 15b ^1-b zw. 15e '' to v / eist, therefore forms a fallback for two oppositely moving bucket. 7

9 and 10, a further embodiment of a device according to the invention is with a star-shaped storage facility 1 as shown in FIGS. There is a removal opening 2 and a scraper 3 assigned. The device has a frame 8b, which is straight and parallel extends to the front of the storage facility 1. The parking spaces 9 of the frame 8b are accordingly arranged in alignment next to each other. Each parking space carries an intermediate container 10 'of elongated rectangular shape Contour. Each intermediate container 10 'has a smaller chamber 10b' on its narrow sides. or 10c 'and between the two a large central chamber 10a 'on. In the field of . the front edge facing the storage system is on the surface of the ■

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Frame 8b arranged a straight running rail 14a. In front of the front of the storage facility 1, a trench 24 runs parallel to the frame 8b. In the trench 24, a rail 25 extends in the longitudinal direction, on which the buckets 7 ¹ ′ can be displaced. The chambers 7a ^fI , 7b ' ^! and 7c ·· the bucket 7 ^t! are assigned to one another in a manner analogous to the compartmentalization of the intermediate containers 10 '. Next to it is a track for a roller 27 on which a conveyor 15f for the buckets 7 ^{I: is} supported. The upper region of the conveying device 15f is mounted to be displaceable with a carriage 17 on the running rail 14a. To carry out the method, the conveyor 15f is displaced parallel to the frame 8b in the direction of the double arrow D so that its upper end area is located above an empty intermediate container 10 '. A bucket 7 ″ is first brought to the central filling and / or metering device 6 and loaded, then moved to the lower end region of the conveyor device 15f and then conveyed via the intermediate container 10. Each chamber of the bucket empties into the corresponding chamber of the intermediate container. If the chambers of the intermediate container are filled in this way, the conveying device 15f can be shifted to the next intermediate container. The transport concrete mixers can move under the parking spaces 9 of the mixing containers 10 'in the manner already shown in FIG. 5 and pick up their contents.

Fig. 10 shows a system with two conveyor devices 15f. In the fig. 9 and 10 no cement silo is shown. This, as well as a water connection, can also be located away from the central filling and / or dosing device are located at another point of the 'trench 24, since buckets are also filled there and pushed up to the conveyors will know.

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11 to 16 show embodiments of devices with displaceable intermediate containers 10 ·. They have an "interior division into chambers 10a"_; 10b '10c' analogously to the containers 10 in FIG. 10. The sloping base 28 leads to an outlet opening 29 for the contents. A bogie 30 is attached under the floor 28. The associated frames 8c extend essentially straight and are at least partially so wide that two pairs of rails 3-1, each provided for the running frames 30 of the intermediate containers 10 ', can run next to one another. The two pairs of rails 3I are connected to one another by transitional sections 32 which are laid at an angle and which can also be designed as switches. The frames Sc are indicated in the plan views according to FIGS. 12, 14 and 16 only by the rail sections. In the embodiments according to FIGS. 11 to 14, the systems are provided with high collecting containers 20 on towers 23, the chambers 20a of which are fed by means of an elevated conveyor and a cross conveyor 22. This arrangement has already been described in connection with FIGS. In the embodiment of the device according to FIGS. 11 and 12, the frame 8c, as can be seen from FIG. 12, has a second pair of rails 31 only in the area of the high collecting container 20, as well as a transition section to this pair of rails on both sides. The "frame 8c is arranged so close to the tower 23 that the short, second pair of rails 31 passes under the outlet of the high collecting container 20. This device enables the following" method: An empty one

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Intermediate container 10 'is ranched accordingly via a transition section 32 to the below pair of rails leading through the high jam container 20 31 brought. There, its chambers are filled with aggregates, cement and water. Afterward the full intermediate container 10 'is returned to the continuous pair of rails 31 and parked. Depending on the accessibility of the frame 8c, the concrete mixers can either be attached to any Move to the location of a full intermediate container and connect your drum to its outlet opening, or one or more easily accessible parking spaces can be designated and used as filling stations the filled intermediate containers can be maneuvered to these parking spaces if required.

The device according to FIGS. 13 and 14 has a via the entire length two pairs of rails 31 supporting frame 8c on, which is arranged at a distance from the tower 23. A conveyor 15g for is fixed on the tower 23 Bucket 7 'attached, from the metering device of the high-level container 20 to the pair of rails closer to the tower 31 leads. To carry out the method, an empty intermediate container 10 · must be maneuvered at this location in each case with the chamber to be filled under the end of the conveyor 15g. Fig. 13 shows two buckets 7 '^ a. the respective end positions of the Conveyor. 14 shows that the conveyor device 15g has two lanes analogous to the conveyor device 15e is designed in Fig. 8, so alternative options for two buckets 7 '' moving in opposite directions at the same time offers. Even with the device according to FIGS. 13 and 14, all the positions of the rail further away from the tower can be

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Paares 31 used for filling or one or more special filling stations for the TraDsport concrete mixer are provided.

15 and 16 show a system in which a star-shaped storage facility for the aggregates and cements iIof. 4- are present. The frame 8c is arranged parallel to that of the storage facility 1 at a distance and corresponds to the design of the frame according to FIG. 14. A conveyor 15h for Bucket 7 * 'is essentially designed like the conveyor device 15b' in FIG. 4. The only difference is that the conveyor 15h is arranged stationary, so not in the lower end rotatable but fixed and is not supported on a roller in the upper area. Furthermore it has, like the conveyor device 15b, a two-lane section as an escape point for two Bucket 7 ". The procedure is the same as for FIGS. 13 and 14 show: An empty mixing container is guided under the conveyor 15h, filled and then onto the outer pair of rails rang.iert, if necessary to a filling station for one Concrete mixer.

In FIG. 17, a partial area of a transport concrete mixer 11 is shown schematically, partially in section. It has a mixing drum 33, supported on a frame 34. The frame 34 can directly the vehicle frame or an intermediate frame of the concrete mixer attached to the vehicle frame be. The mixing drum 33 tapers from a region 33a conically to both sides. Of the rearward tapering section is at 33b

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denotes and ends in a usual filling and emptying opening 35 · The section extending forward is denoted by 33c and ends in a Drum base 36. The mixing drum 33 is opposite the frame 34- with in the direction of the filling and emptying opening 35 rising axis E mounted. A drum section 33t> serves to hold it in a rotatable manner surrounding running ring 37 »which is supported on a bracket 38, and a hollow axle journal 39 which is connected to the drum base 36 via a hub and which is inserted into a sleeve-shaped Support bearing 40 engages rotatably, which in turn by means of one of the assembly facilitation, and after the assembly fixed joint 41 is supported on a bracket 42 resting on the frame 34. ? .on the A conventional water tank 43 rests on the support bearing 40 On the inside wall of the drum are helical extending blades 44 arranged with a relatively large pitch, which when rotating the mixing drum 33 in a sense to pull the concrete filled in at 35 in the direction of the drum base 36 and at one Turning the mixing drum in the other direction of rotation, convey the concrete out through the opening 35. The blades 44 are designed in such a way that they are especially suitable for pumping concrete. To drive the drum 33 in rotation is a ring gear on the outside of the drum base 36 attached. A pinion engages in the ring gear 45 at 46 indicated liquid motor. The fluid motor 46 is via hydraulic lines from a pump, not shown, which sits on the frame 34 and is driven by the internal combustion engine of the vehicle or its own drive motor.

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In the mixing drum 33 there is provided a compulsory mixing tool, generally designated 18 ″, which consists of two or more rings of arms 47 with blades 48 provided at their free ends
the inside of the mixing drum 33 protrudes and in the
Axle journal 39 is rotatably supported. The wave 49
can be driven independently of the mixing drum 33 by a motor 50 », for example a liquid motor, via a reduction gear. That
The compulsory mixing tool 18 is dimensioned such that it extends in the axial direction of the mixing drum 33 ″ from the drum base 36 over approximately a quarter of the length of the mixing drum. Something could also extend
extend further, up to a maximum of approximately half the length of the mixing drum, but the optimal longitudinal extent is approximately a quarter to a third of the
Drum length. The compulsory mixing tool 18 rotates
against the direction of rotation of the mixing drum 33 and the
Vanes 48 are arranged so that they snugly within the inner edges of the helical
Rotate blades 44. That way becomes a
Forced mixing of the concrete transported in the mixing drum 33 is guaranteed. The mixing drum 33 can be very slow or even at times
do not rotate.

The invention is not restricted to the exemplary embodiments and the methods made possible thereby. Thus, depending on the existing facilities, in particular the warehouse for the concrete components, as well as dependent of the existing funding facilities that

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Position of the frame, possibly several frames, the arrangement of the parking spaces and the conveying devices for or for the intermediate containers "vary. Instead of the buckets shown on most devices, other organs of the filling and / or metering devices can also be used. Particularly in the case of supplements with high-level collection containers as the filling element, a slide device is also possible, the one for stationary, ring-segment-shaped
The intermediate container can also be rotatably arranged.
Another possible embodiment, which is not shown in the figures, is the possibility
to fill empty intermediate containers at ground level and
to move them, for example with an IC crane system, to parking spaces accessible to the concrete mixer.

509831/0193

Claims (17)

Claims / 1 J Process for the production of precast concrete in which Cement, aggregates and water are dosed and separated according to reactive components into at least an intermediate container is filled, mixed and brought to the construction site in ready-mixed concrete mixers, characterized in that a plurality of intermediate containers filled with metered components provided and each intermediate container emptied directly into a ready-mixed concrete mixer will. . 2. The method according to claim 1, characterized in that that transport concrete mixers are used which are equipped with compulsory mixing tools. 3 «device for performing the method according to claim 1 and 2 with devices for filling and / or dosing cement, water and aggregates, with at least one chamber for the individual components having intermediate containers, with transport concrete mixers and marked with at least one filling station for the transport concrete mixer through a plurality of intermediate containers (IQ) and storage spaces (9) for these, conveying devices (15) for the concrete components and / or the organs (7) of the filling and / or metering device (6) and / or the Intermediate container (10). 509831/0193 4-. Device according to claim 3 »characterized by g e k e 'η η, that the intermediate container (10) are arranged stationary on parking spaces (9), the Conveyor devices (15) leading to the individual parking spaces adjustable and each parking space of an intermediate container (10) is designed as a filling station for the transport concrete mixer (11). 5. Device according to claim 4, characterized in that g e k e η η, that the intermediate container (10) is arranged in a ring segment shape on a frame (8) are that the center of the ring coincides with a filling and / or metering device and at least one conveying device (15) radially from the filling and / or metering device to each intermediate container is adjustable in the lead, 6. Device according to claim 4-, characterized in that the intermediate container (10) arranged stationary on a straight frame (8b) and the conveyor device (15) parallel to the frame (8b) like a bridge between the filling and / or metering device (6) and a running rail (14) in front of the parking spaces (9) is slidably mounted. 7 · Device according to at least one of claims 3 to 6, characterized in that the organs (7) the filling and / or metering device (6) for simultaneous Transport of all components in chambers (7a> 7b, 7c) divided according to the chambers (10a, 10b, 10c) of the intermediate container (10) and each provided with a corresponding dispensing opening are. 509831/0193 -τ- ■ 8. Device at least according to claim 3 _5, characterized in that the intermediate container (10 ″) are designed to be movable and at least one pair of rails leading past the filling and / or metering device (6) is provided as a conveyor device (31). 9. Device at least according to claim 3 ₅ thereby ge - k e η η ζ e i chnet that a conveyor device (15) for components and / or organs (7) for filling stationary between the filling and / or dosing device (6) and a filling point for the intermediate container (10) and the intermediate container to at least one Pair of rails to and from the filling station are mobile. 10. The device at least according to claim 8 or 9, characterized marked that the pairs of rails (31) for the intermediate containers (10) are at least partially double-track with transition sections (32). 11. Device according to at least one of claims 3 "to 10 ,. gekennz thereby that the conveyors (15) for the organs (7) of the filling and / or dosing device (6) for simultaneous demands. in both directions at least partially, with two lanes are trained. 12. The device according to at least one of address 3 to 11, characterized in that at least two independently of one another movable in the same direction conveyor devices (15) are provided. 509831/0193 13 · 'Device according to at least one of claims 3 "to 12, marked by the fact that for the Components is provided as a conveyor at least one rin nen- and / or tubular chute. 14. The device according to at least one of claims 8 to 13, characterized in that the Pair of rails (31) leads to at least one filling station for transport concrete niches. 15. Device according to at least one of claims 9 "to 12, characterized in that at least a pair of rails (31) a number of storage spaces for intermediate containers accessible to transport concrete mixers (10). · 16. Device according to at least one of claims 3 to 15, characterized in that at, each Storage space (9) or each intermediate container (IC) with the drum (12) of a transport concrete mixer (11) is arranged in the area of the filling opening (35) couplable filler neck (13). 17. Device according to claim 16, characterized in that the drum (12) of the transport concrete mixer (11) Catch organs (13a) for the automatic coupling with the filler neck (13) on v / ice « 509831/0193