DE2360240A1 - Plant for mfg. ready-mixed concrete - using two prefabricated units to make a plant with low height - Google Patents

Abstract

In this high prodn. plant the aggregates are stored on the ground and a drag-line excavator used to convey the materials to a distributor fitted with a dosing device; cement and water weighing units are also provided. The novelty is that two transportable, prefabricated, box-shaped frames are used to house all the plant with the exception of the distributors and the concrete delivery chute, one frame being mounted on top of the other. A body bolster and wheels can be attached to the frames so they can be transported to the site along public highways. The major part of the installation and assembly work can be done in a factory using mass prodn. and therefore economic methods, after which the equipment is moved to the site. The frames eliminate the need for extensive foundations and high, heavy, steelwork; they help to meet recent laws w.r.t. protecting the countryside.

Description

10 3 6 5

■ ELBA-WERK Maschinen-Gesellschaft mbH & Co. 7505 Ettlingen / Baden

Device for making concrete

The invention relates to an apparatus for producing Concrete for high performance, used in ready-mixed concrete plants, precast factories and can be used wherever large quantities of concrete are removed.

In addition to mobile devices for producing concrete on construction sites, are fixed concrete preparation devices for the production of ready-mixed concrete and of concrete for the supply of Precast factories are known as so-called mixing towers. In such mixing towers are essentially under a silo for the aggregates the aggregate weigher, the cement weigher, the water supply, the mixer, the control device, a concrete storage silo and a Transfer funnel arranged. Under the transfer funnel, in addition to the overall height that the above-mentioned parts take up, another space can be left free to prevent driving under the

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feed hopper made possible by ready-mix concrete vehicles. In addition, the overall height is increased by the amount required for the Delivery part of a bucket elevator or a conveyor belt and for a rotary distributor is required, i.e. for the devices with which the aggregates are brought in and distributed in the silo pockets. Mixing towers of this type thus achieve a construction height of 30 m. In addition, additional, also very high shoring for the reception of cement silos next to the actual Mixing tower must be set up so that the mixer can be supplied with the binding agent without interference.

According to the required height and the fact that the aggregate silo and the cement silo are very heavy loads must be included in the height, there will be considerable expenses for foundations, support structures, stairs and remote displays necessary for such mixing towers. Assembly is dangerous, it requires the use of tall cranes, and it is time consuming.

With the increasing demands for environmental protection and landscape protection In certain areas, building permits for such mixing towers are no longer granted.

It has therefore already been proposed, a mixing tower with on the ground, sector-shaped storage areas for the To combine aggregates, as they are known from construction site concrete preparation (DT-GM 1 917 264). The aggregates are while the high-lying weighing device located above the mixer is fed by bucket elevators, some of which are in the supporting pillars the Miseherbühne are housed. Above the mixer platform, under which in turn the cross-section for the transport mixer must be kept free, the mixers are built in vertical order,

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the weighing equipment for aggregates and cement as well as the cement silos. This also results, albeit weakened, all disadvantages of the mixing towers described above with regard to the height of the structure, the extensive foundations, the heavy support structures and the difficult, time-consuming assembly. Then there is the complicated one Arrangement of the bucket elevators that lift the aggregates from the ground-level storage areas, six of which are stored There must be six types of aggregate, as is often required.

This resulted in the object underlying the invention, which consisted in providing a device for producing concrete for high To create performance that eliminates the disadvantages of mixing towers and which also meet the requirements of environmental and landscape protection enough.

This object was achieved according to the invention in that in a device for producing concrete, with located on the ground, Sector-shaped storage areas for the aggregates, an aggregate dispenser with a Sdirapp device sitting on it, to accumulate the aggregates against the feeder, with dosing and weighing devices, a mixer and a concrete transfer, all device parts, apart from the distributor and the concrete transfer, in two box-shaped, prefabricated, separately transportable Containers are arranged, which are placed on top of each other to produce the functional device.

The two containers are in the operating position in their longitudinal direction so offset one on top of the other that the dispenser can be placed on the free upper part of the lower container and is the concrete transfer to the free front part of the upper container

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connects. The dosing caps are in the lower container, the filling station of the dosing container with dosing scales, the lower part of an elevator track for the dosing container and the mixer.

In the upper container is the upper part of the elevator with the transfer point for the dosing container, the cement scales, the spirit level, the display of the dosing scales and the control cabin, which are positioned freely above the lower container lies.

A further development of the invention is that instead of the feeder an aggregate silo on the free upper part of the lower Container is arranged. Instead of the dosing container elevator can be used as a weighing and conveying device for the aggregates, between the dosing caps and the mixer in the lower part Container can also be arranged a weighing belt.

An elevator track is provided as a concrete transfer, in which a transport container from a filling position under the mixer into a high emptying position is moved at the end of the elevator track. The concrete transfer follows the free front part of the upper container in which the control cabin is located, from which the concrete transfer can be observed.

A further development of the invention consists in that as a concrete handover A concrete pump is provided under the mixer, from which a 'delivery hose to a high, pivotable one Cantilever held transfer mouth leads. Instead of the concrete pump, a pit can be provided under the mixer, which allows a transport mixer to be driven in for direct concrete transfer.

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If the device is relocated from one place of use to another, only the allocator and the concrete handover are required removed and the upper container lifted off. Road trolleys are then attached to both containers for transport hinged on the narrow sides, which come from a steering column chassis and a trailer.

The main advantages of the invention are to be seen in the fact that by installing the essential parts of the device in two separate, transportable containers, most of them all Assembly and installation work can be relocated from the point of use to the factory, where it is standard and therefore economical can be carried out. At the point of use, only the two containers have to be stacked on top of one another in a modular manner. to set up the feeder with the clipping device or the aggregate silo, to connect the concrete transfer and to connect the 'sections of the dosing container elevator track with each other. The latter Partial work is even avoided if there is a weighing conveyor belt in the lower container. The entire device is factory-made fully installed up to the control panel and line separations between the upper and lower container are simply plugged together.

Heavy foundations, support structures, high mixer platforms and assembly scaffolding are no longer required. The work on site is easy and harmless because it no longer has to be carried out at great heights and the provision the aid is cheaper. Repair work can also be carried out quickly and easily. The mixer can be extend to level ground and no longer have to be lifted down from a high mixer platform. Also is the inside of the device

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fully heatable because the rooms of the containers are closed all around.

After all, the equals. Device because of its low overall height compared to mixing towers and the possibility of noise isolation, also the demands of environmental and landscape protection.

An exemplary embodiment is described below with reference to the drawing. In the pictures show:

Fig. 1 is a side view of the device, with the side wall omitted and cut open Pit;

FIG. 2 shows a side view of the device according to FIG. 1, with modified aggregate metering; FIG.

Fig. 3. a side view of the device of Figure 1, with modified concrete transfer;

4 shows a side view of the device according to FIG. 1, with modified aggregate storage and modified concrete handover.

On the ground level 1, the lower, box-shaped, self-supporting container 2 is set off and the upper one on it, as a modular system box-shaped, self-supporting container 3 placed. The upper container 3 is placed so offset in the longitudinal direction, that a free front part is formed as a metering table 4. On the metering table 4 is the dispenser 5 with the Radialschrapp plant 6, with which the aggregates 7 from the sector-shaped storage bins 8 are accumulated against the distributor 5.

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The containers 2, 3 are completely preassembled and installed and can be driven on roads by means of hinged bogies (not shown).

The outlet closures 9 for the passage of the aggregates 7 are located in the lower container 2 under the metering table 4 into the metering container 10, which is here in its filling position I on the metering scale 11. The weigh feeder 11 closes the elevator track 12 to ,, which leads to the transfer point II in the upper container 3, in which the drawn-up dosing container 10 delivers its contents to the mixer 13, which in turn is in the lower container 2 and for repairs or replacement can be extended to ground level. Also the parts of the elevator track 12 in the lower container 2 and in the upper container 3 are pre-assembled and are only in operation with one another tied together.

In the upper container 3 there are still the cement scales 14 and the spirit level 15, which contain their contents, above the mixer 13 Deliver directly to mixer 13. The cement weigher 14 is supplied via the cement screw 16 from the cement silos 17, which also stand behind the device at ground level. Furthermore, the elevator motor 18, the control display, is in the upper container 3 19, which is connected to the weigh feeder 11 via the line or the linkage 20 and the control cabin 21 with the control panel 22 arranged. Due to the offset arrangement of the containers 2, 3, the control cabin 21 stands freely above the lower container 2 and allows unhindered observation of the concrete transfer 23.

The concrete transfer 23 consists of the framework 24 with the elevator track 25, the drive 26 for the transport container 27 and the

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Storage silo 28, with the transfer funnel 29. From the mixer outlet 30, the finished concrete is transferred to the transport container 27 in its filling position III in the pit 31. Then it takes place pulling up the transport container 27 into the emptying position IV with the transfer of the concrete into the storage silo 28.

In an advantageous modification, instead of the additive metering with the dosing container 10, the dosing scales 11 and the elevator track 12 under the outlet closures 9 in the lower Container 2 can also be arranged a weighing conveyor belt 32 which opens into the mixer 13 (Fig. 2). It is then also omitted upper part of the elevator track 12, which otherwise leads into the upper container.

The concrete transfer 23 can also be modified advantageously, by placing a concrete pump in the pit 31 under the mixer outlet 30 33 is set up, the conveying hose 34 of which via the pivotable boom 35, which rests on the upper container 3, is led to the high transfer terminal 36 (Fig. 3).

A further modification of the concrete transfer is possible insofar as an enlarged pit 37 for direct access under the device Retraction of a transport mixer 38 can be created (Fig. 4). The finished concrete is then directly from the mixer 13 through it Passing outlet 30 into the transport mixer 38.

Finally, in all embodiments of the device, instead of the distributor 5, with the radial scraper 6 and the ground-level storage bins 8, an aggregate silo 39 on the Dosing table 4 are arranged (Fig. 4). The aggregates then pass directly from the chambers of the aggregate silo 39 the outlet closures 9 in the dosing container 10 or on the

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Weighing conveyor 32. The filling of the chambers of the aggregate silo 39 takes place via the rotary distributor 40.

10 3 6 5
11/30/1973

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Claims (10)

10 3 6 5 Claims Device for making concrete for high performance, with sector-shaped storage areas on the floor for the aggregates, an aggregate dispenser, with a scraper device sitting on it, to accumulate the aggregates against the feeder, with Dosing and weighing before devices, a mixer and a concrete transfer, characterized in that all device parts, except for the feeder (5) and the concrete transfer (23), in two box-shaped, prefabricated, separately transportable containers (2, 3) are used to produce the functional Device are stackable. 2. Device according to claim 1, characterized in that that the two containers (2, 3) are placed on one another offset in the longitudinal direction in such a way that on one free upper part as a metering table (4) of the lower container (2) of the dispenser (5) can be placed and is attached to a free front part as a control cabin (21) of the upper container (3) connects the concrete transfer (23). 509824/0072 - η - 3. Device according to claims 1 and 2, characterized in that the lower container (2) Outlet closures (9), the filling station of the metering container (10) with metering scales (11), the lower one Part of an elevator track (12) and the mixer (13) are arranged. 4. Device according to claims 1 and 2, characterized in that the upper container (3) upper part of the elevator track (12) with the transfer parts for the dosing tank (10), the cement scales (14), the spirit level (15), the control display (19) the weigh feeder (11) and the control cabin (21) are arranged. 5. Device according to claims 1 and 2, characterized in that that instead of the feeder (5) an aggregate silo (39) on the metering table (4) of the free Part of the lower container (2) is arranged. 6. Device according to claims 1 and 3, characterized in that that as a weighing and conveying device for the aggregates between the outlet closures (9) and a weighing conveyor belt (32) is arranged in the mixer (13). 7. Device according to claims 1 and 2, characterized in that that as a concrete transfer (23) an elevator (25) is provided in which a transport container (27) from a filling position (III) under the mixer (13) to a high emptying position (IV) at the end of the elevator track (25) is movable. 509824/0072 8. Device according to claims 1 and 2, characterized in that a concrete pump (33) is provided as the concrete transfer (23) under the mixer (13), of which a conveying hose (34) to a high, pivotable boom (35) held transfer mouth (36) is guided. 9. Device according to claims 1 and 2, characterized in that an enlarged pit (3V) for retracting a transport mixer (38) and for direct concrete takeover is provided under the mixer (13). 10. The device according to one or more of claims 1 to 9, characterized in that at each of the Containers (2, 3) for transporting known road chassis, consisting of a steering column chassis and a trailer, can be attached. 3 6 5 509824/0072 Blank page