Agitating – Mortar mixer type – With elevating means
Reexamination Certificate
2001-07-19
2004-12-21
Soohoo, Tony G. (Department: 1723)
Agitating
Mortar mixer type
With elevating means
C366S033000, C366S053000, C366S606000
Reexamination Certificate
active
06832851
ABSTRACT:
The present invention relates to a transportable concrete mixing plant, in which all the components can preferably be transported in standard shipping containers.
Transportable concrete mixing plant is used by civil construction companies on building sites whose concrete requirement cannot be covered practically by the inward transport of concrete mixed at another site (for example in stationary transportable concrete mixing plant), for example using the known concrete mixing vehicles. This case may arise on large building sites, for example within the context of traffic projects, in which the concrete requirement is extremely high. However, the inward transport of concrete by means of concrete mixing vehicles may not be practical either in the case of very isolated building sites, so that in this case, too, a concrete mixing plant is needed on site.
For this reason, numerous civil construction companies have transportable concrete mixing plant, which is erected on a building site to produce concrete on site. For this purpose, concrete mixing plant of this type is formed from a number of mixing plant components which can be connected detachably to one another, which are transported to the building site individually, for example using heavy goods vehicles, and are assembled there.
In this case, the problem often arises that the mixing plant components, such as concrete mixers, cement silos, conveyor belts and the like, have dimensions which are unusual, because of their function, for which reason their transport, for example on heavy goods vehicles, is made more difficult. It is often necessary to apply for special approvals, which entails additional costs and delivery-date problems. In the case of transport by marine freighter or goods train, such as is necessary in the case of construction companies which are active superregionally or even worldwide, these unusual dimensions, excessive widths and the like of the mixing plant components lead to considerable costs and delays during transport.
It is therefore the object of the invention to provide a transportable concrete mixing plant whose components can be transported more quickly and more cost-effectively without using means for this, such as packaging devices or covering materials, which are not required for the actual operation of the concrete mixing plant, and therefore would give rise to unnecessary costs and an increased requirement for space on the building site.
According to the invention, this object is achieved by a transportable concrete mixing plant comprising a number of mixing plant components which can be connected detachably to one another and which during transport are accommodated in a number of containers, at least some of these containers, preferably all of these containers, serving as a load-bearing structure for mixing plant components and/or containers for concrete raw materials when the mixing plant is operating.
The invention offers the advantage that the containers containing the mixing plant components can be offloaded quickly, worldwide, at offloading stations of harbours, railway stations and the like, using the cranes and the like which are available there for this purpose. In addition, the transport of containers, using marine freighters, goods trains, heavy goods vehicles and the like, does not present any difficulties, so that the relatively rapid and cost-effective transport of the mixing plant components is possible, even over great distances.
The invention also offers the advantage that the containers protect the mixing plant components during transport and, in addition, offer transport volumes for the equipment needed additionally during the use of the concrete mixing plant.
Furthermore, the use of containers as a load-bearing structure for mixing plant components or as containers for concrete raw materials, such as aggregates, binders, water, additional compounds and additives, when the mixing plant is operating, offers the advantage that no separate devices have to be carried at the same time for this purpose. In this case, the containers can be used both as an open load-bearing structure similar to a framework and as a closed load-bearing structure similar to a housing. This means a reduction in the outlay on transport and, in addition, always ensures the completeness of all the components needed for the operation of the concrete mixing plant.
In order to be able to configure the transport of the concrete mixing plant particularly simply, it is proposed that the containers be standard shipping containers or be capable of being combined into standard shipping containers which can be transported in a standard way in accordance with international regulations, especially by ship, rail and heavy goods vehicle. The transport of the concrete mixing plant can then be carried out with any marine container freighter, container goods train and so on, which permits particularly rapid and cost-effective transport.
In order to be able to utilize the load-bearing structure or container function of the containers in a simple way, provision is made for at least some containers to have openable hatches through which, when the mixing plant is operating, mixing plant components accommodated in various containers, at least to some extent, can work together. Following transport, the containers are set up first of all on the building site at predefined relative positions beside one another or above one another, then the hatches in the walls of the containers are opened and the mixing plant components contained in the respective containers are, if appropriate, drawn out through the opened hatches in such a way that they can work together when the plant is operating. This offers the advantage that it is generally not necessary to lift mixing plant components out of their respective container.
In order to implement a transportable concrete mixing plant according to the invention, it is proposed that it have at least one mixer container, which contains at least one concrete mixer for the mixing of aggregates, of preferably cement-containing binder, of water and of additional compounds and additives for producing concrete and, by means of the fitting of appropriate components, can be extended in such a way that the performance is increased to correspond to the requirements of the building site, for example expansion from one to up to four mixers with corresponding enlargement of the number of silos, metering systems, conveying devices and so on. In this case, the concrete mixers used can be, for example, double-shaft mixers, known per se, in order to achieve high concrete production speeds in civil engineering, these mixers being filled from above with aggregates and binder and having at the bottom a bottom emptying opening, which can be closed as desired, for the removal of concrete. The number of mixers per container is essentially restricted by their space requirement and the permissible total weight of the container.
In this case, provision is advantageously made for that wall of the mixer container which is located above each mixer when the plant is operating to have a hatch which can be opened above each mixer. Through this hatch, which is opened when the plant is operating, the aggregates and the binder and, if necessary, additives are fed to the concrete mixer.
In an advantageous further development of a transportable concrete mixing plant of this type, it is proposed that it comprise at least one stackable mixer container which, when the mixing plant is operating, is arranged on the mixer container and which contains loading means for the introduction of binder, preferably cement, and of aggregates and, if necessary, additives into each mixer through the openable hatches located in the upper wall of the mixer container and through hatches which can be opened and are located in the bottom wall of the stackable mixer container, opposite the hatches. In the simplest case, these loading means could comprise a pipe which opens from above into the concrete mixer through the opened hatches.
However, provision is
Sidley Austin Brown & Wood LLP
Soohoo Tony G.
Walter-Heilit Verkehrswegebau GmbH
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