ES2730959T3 - Mobile device for the preparation of a concrete mixture - Google Patents

Abstract

The mobile device for producing a concrete mixture consists of a frame (14) provided with a chassis (15) or of a frame (14) provided for a connection with a chassis (15), in which at least one reservoir (11 ) of binding agent and at least one filling tank (10) are arranged in the frame (14), where a mixing device (1) is also attached to the frame (14), in which the tank (11) of binding agent and the filling tank (10) are provided with feeders for feeding the filling agent and binding agent into the mixing device, wherein the mixing device (1) is disposed between the filling tank (10) and the mixing device. binding agent reservoir (11) and wherein the filling reservoir (10) is disposed at the rear end of the frame (14), wherein the binding agent reservoir (11) and the refilling reservoir (10) are provided at its bottom with respective feeders to feed the binder and filler into the device or mixing, characterized in that the tanks (10, 11) together with the respective feeders are provided essentially above the frame (14), while the mixing device (1) is provided essentially below the frame (14), being the mixing device (1) provided with a discharge opening in its lower part in which a finished mix tank (2) is arranged below said discharge opening, where the finished mix tank (2) is formed as a channel and a housing of the mixing device (1), in which in the transport position, the tank (2) of finished mix surrounds the mixing device (1) which is designed to be lowered below the device (1) of mixture in order to increase its volume, where the tank (2) of finished mixture is provided in its lower part with an agitation device (8) that has a pump (3) of the finished mixture.

Description

DESCRIPTION

Mobile device for the preparation of a concrete mixture

Technical field

This invention relates to a mobile device for producing a concrete mixture. The term concrete mixture for the purposes of this invention should be understood as any mixture produced by mixing the filler with a binding agent, which in addition to the concrete mixtures also includes anhydrite mixtures, foam concretes, cement mixtures and similar products. The binding agent is advantageously, especially a cement and anhydrite, but also other materials, which when mixed with a filler in a mixing device, lead to a hardening mixture, such as concrete and the like. The term filler according to this invention mainly means an aggregate of sand and / or gravel.

State of the art

There are currently several types of mobile mixing devices for the production of different types of concrete mixtures, including mixtures of anhydrite and cement and other mixtures, all of which, as already mentioned, to simplify in the following description are included under a uniform term of "concrete mix". Mobile devices for producing a concrete mixture are placed in the chassis of a truck or made in the form of a semi-trailer; All these devices have a common feature, which is the concrete mixing mixing device arranged at the rear of the vehicle or semi-trailer.

There are known mobile devices for the production of concrete mixtures, which have deposits of a filler and cement, or other binding agent, adapted for lifting, similar to the lifting of the truck or semi-trailer platform during unloading, for the purpose of feed the material by gravity into the feeding devices. An example of such a device is a product sold under the trade name TransMix Brinkmann, the company that belongs to the Putzmeister Mortelmaschinen GmbH business group. In most of the mobile devices for the production of concrete mixtures, in which the tanks are raised, the material is dosed in the mixing device, for example in the case of the binding agent through a short screw feeder, or in the case of filling by a short band, a screw feeder or other device directly from the tank located in the raised technology, with which the tank is firmly connected. The mixing device is located at the rear of a truck or semi-trailer and, therefore, is arranged during the lifting of the relevant part of the mobile mixing device together with the farthest deposits. A disadvantage of this arrangement is that the amount of filling is substantially limited by the capacity of the filling tank, because filling of the heavy filling in the raised tank during operation of the mobile mixing device in terms of safety is practically excluded. In case it is necessary to produce a greater amount of concrete mix than the capacity of the tanks allows, it is necessary to tilt the section back with the tanks and ensure their filling with special devices, such as a loader, a hydraulic arm or the belt conveyor, but this induces higher production costs of the mixture produced. Because in this type of mobile device for the production of concrete mixtures, the gravel aggregate cannot be filled in the working position, there are pauses necessary to fill the material and a completely continuous production of the mixture cannot be guaranteed. of concrete. This reduces labor productivity and, for example, the quality of the anhydrite soil deteriorates. Therefore, this type of mobile device cannot produce more than 15 m3 of mixture, which is obtained by reserve of filler and binder, while the subsequent continuation of the production of the concrete mixture is very complicated and also expensive. When a greater amount of concrete mix is required than can be produced from the amount in deposits on the truck or semi-trailer, and the special equipment mentioned above for filling is not available, then the production of the concrete mix It ends and the vehicle, along with all the technology must be moved to the filling terminal, where the raw materials are complemented for a production of another 15 m3 of concrete. This procedure is very long and expensive. In addition, in this case, production is limited by the availability of the filling terminal, especially its distance from the place of production of the concrete mixture. This system essentially prevents the effective production of anhydrite or concrete mixture in an amount greater than that which can fit in the tanks, which currently have the mentioned volume of 15 cubic meters. Another disadvantage of this device is the possibility of its use only in places where it is possible to guarantee the required lifting of the technology and where there is no risk of overturning the entire semi-trailer, such as on a sloping substrate.

Another type of mobile mixing device is such that the tank with material will not be lifted and the material in a mixing device will be dosed through a long feeder that runs below the entire tank. An example of this solution is a European patent application EP 2636499 A1 of 06/03/2013, which describes a mixing unit arranged in the chassis of a truck, which comprises a filler tank and a cement tank. Under the filler tank and along its entire length there is an outlet opening consisting of two parts, inclined to each other, thus ensuring its continuous emptying. A long feeder is running under the filling tank. The binder agent reservoir is arranged behind the filling reservoir and above a section of mixing equipment technology, which is located at the rear of the vehicle. The The amount of concrete mixture also produced in this case is limited by the capacity of the deposits, so, without using a special technique to complement the filler and / or the bonding agent, it is again possible to produce a maximum amount of approximately 15 m3 of the mixture. It is important to keep in mind that the maximum fill volume in the truck or semi-trailer is generally limited by the maximum allowed weight of the vehicle or semi-trailer, possibly by the permitted loads on the axle. Due to the placement of the refill tank, the refill procedure is substantially similar to that described for the first type and requires special technology. The fact that in this mixing device it is not necessary to lift the entire tank does not present any substantial advantage for the possibility of guaranteeing the continuous production of large volumes of concrete mix. The only difference is that the addition of padding can take place in the work position. But it is practically impossible to ensure the filling of the filling in the respective tank without the use of additional devices that allow refilling. The main advantage of the tank without lifting is the greater stability of the machine in the working position, when the center of gravity is placed lower than in the case of lifting technology. However, all the difficulties associated with the production of large volumes at a construction site still exist. Other similar mobile mixing devices are described in US 2007/0189109 or FR2982190, which also contain tanks arranged consecutively for filling and the binding agent, in the case of FR2982190 even other possible deposits, with all the disadvantages described.

The published German patent application DE19631312 discloses a mobile device according to the characteristics of the preamble of claim 1 and is used for the preparation of mortar for floor screeds from sand, binder and water. This device comprises a semi-trailer, in which a sand deposit is located at the rear and a deposit of anhydrite bonding material is located in the front part of which. A mixing device is located between the sand tank and the anhydrite binder tank. A similar mixing device is disclosed in a patent application FR 2 900 592, which further comprises means for generating power capable of imparting thermal energy at least to the sand compartment. The disadvantage of both devices is that said devices disclose a complicated feeding structure in order to bring the load and the bonding agent to the mixing device. The other disadvantage is that they are intended for the use of a mortar for floor screeds, not for the preparation of a concrete.

Another type of mobile mixing device is disclosed in patent application GB 2503005. This document discloses a mobile mixing device mounted on a railroad car. The mixing device consists of two mixers that have common reception means for receiving the mixed product from the mixers.

If the disadvantages of the existing devices are summarized, then, in the case of technologies that use the lifting of filled tanks, there is a danger of tipping over when the tank is in the raised position, limited choice of workplace; for some situations, this technology is completely inappropriate (for example, the lack of elevation of the deposits to the desired height due to the presence of obstacles); The filling of the filling can be done only in the resting position, which can cause problems with the quality of the concrete mixture produced in continuous production above the capacity of the tanks, which is generally 15 m3. To supplement the filling requires a special technique, for example excavator, combination with belt unloader, loaders, etc., resulting in increased costs and the need for additional space around mobile devices; In some countries, special devices are virtually unavailable. Last but not least, there is a small pool of binder for continuous production and, consequently, the need for frequent refills with the consequent increase in costs spent on the operation of additional techniques, for example tank with binder etc.

After the evaluation of the aforementioned disadvantages of known mobile devices for producing concrete mixtures, it is evident that they can be summarized in the following headings:

a) in the case of the production of a greater quantity of concrete mix than that which can be produced from the deposits, the presence of special techniques is necessary to complement the filling, such as excavator, combination with a discharger of band, charger, etc., resulting in increased costs and the need for additional space around the mobile mixing device. In addition, in some countries, this special technique is barely available;

b) as a result of having to transport landfill, due to the maximum possible load of the wheels of the semi-trailer, or the total allowed weight of the whole set, only a relatively small reserve of binding agent is possible, generally only about 6 cubic meters , which is a problem in the continuous production or in the production of a larger quantity of mixture, which can be produced from the transported amount of binder. In such situations, a frequent recharge of the binding agent is necessary and an increase in costs is induced for the operation of other techniques, such as a cistern with cement, etc.

c) Higher rear axle load due to the presence of a heavy mixing device at the rear

d) A small stock of filler or binding agent.

e) problems with continuous production above 15 m3, including problems with the quality of the final product.

Object of the invention

According to this invention, a mobile mixing device is presented as described in claim 1 and the advantageous features are described in the dependent claims. In the production of the concrete mixture in a mobile device for the production of the concrete mixture, the following procedure is preceded: Before the arrival of the mobile mixing device for the production of the concrete mixture at the construction site, Fill the binder tank, either from a silo with a binder or from a tank. The filling tank is then filled, advantageously by means of a charger, which is faster, or using the filling device, which is part of the technology. Upon arrival at the construction site, the mobile device for producing the concrete mixture is deployed in the working position, so that the tank of the finished mixture descends, for example hydraulically, until the mixing device is placed in the transducers of tension measurement, which allows to detect the weight of individual components of the concrete mixture, if its precise quantity is required, given, for example, by the type of concrete and the like. It is obvious that the dosing of the individual components of the concrete mixture can be carried out by any suitable method commonly used in the preparation of concrete mixtures, so that the presence of the voltage measurement transducers and their placement before starting the Concrete mix preparation are not absolutely necessary and are mentioned here only as an advantageous solution. If necessary, the automatic filling gravel aggregate receiver reservoir is also deployed, where, according to another preferred embodiment of this invention, the appropriate part of the receiving reservoir, including the filling screw feeder, is lowered to the ground, for example, again using hydraulic systems, and the individual walls of the tank are deployed, for example mechanically, so that a truck with gravel aggregate can drive back to the tank and unload the gravel aggregate into the receiving tank. Using two oblique screw feeders, the gravel aggregate will be transferred to the filler tank. The oblique screw feeders are fed by two horizontal screw feeders.

When the production of the concrete mixture begins, the quantity of the individual components is specified in the recipe for the desired concrete mixture, which is advantageous and common in this technical field. The dosage order of the individual components is optional and is preferably given by the recipe and the corresponding technological process to produce the given mixture. The ingredients in this case are weighed in the mixing device, which is weighed. The control system first activates the mixing device, then the screw feeder doses the binding agent in the mixing device, until the entire required amount is dosed. Subsequently or simultaneously (if technology permits), the water is dosed - for example, through a flow meter. Finally, using a belt feeder or a filler feeder, the filler - mainly the gravel aggregate - is dosed into the mixing device. In the mixing device, the concrete mixture is mixed and then discharged into the tank of the finished mixture, where it is mixed with a stirrer. Finally, the finished concrete mixture transported from the tank for the finished mixture to the destination, is advantageously pumped continuously with a pump and transported to the storage place by a hose, connected to this pump or transported to the storage place using other devices. The hose can be 150 m long. After draining the finished concrete mixture from the mixing device into the tank of the finished mixture below it, the entire production process of the mixture continues to be repeated: gradually filling the mixing device with individual components of the concrete mixture, its mixing and unloading the mixture in the tank

After finishing the production of the mixture, first all the concrete mixtures produced are extracted, then all the parts of the mobile mixing device that came into contact with the concrete mixture produced are thoroughly washed with water, better with pressurized water .

The advantages of the mobile device for the production of concrete mixtures according to this invention are especially the following:

- allows continuous filling of the filler tank in working position

- the deposits, thanks to the symmetrical arrangement in the frame, can be large enough, both for the binding agent and for the filling, so that their proportions can be changed flexibly according to the type of work order and for Smaller orders do not need to guarantee recharge.

- Given the location of the filler tank at the end of the semi-trailer, it is easy to install the refill equipment itself and ensure easy access to it for the refill operation, thus allowing refills to be filled without special equipment or the need for space additionally and thus, operating costs are significantly reduced and competitiveness increases. The problem of what to do with the rest of the landfill has also been eliminated, since it is transported in tanks;

- the large capacity of the filling tank and the sufficient performance of filling the filling tank allow the continuous production of concrete mix, but with a simpler supply logistics, since there is no need for special equipment and the filling supply is Guaranteed by conventional trucks with folding cargo space. The shorter filling time also reduces production costs thanks to the short downtime of the trucks that supply the landfill;

- the large capacity of the tanks allows different combinations of filling of the tanks according to the availability of filler resources or binding agent for the construction and according to the production needs

- better load distribution, since the mixing device with the finished mixing tank is not at the rear.

Brief description of the drawings

The invention will now be described in detail with reference to the accompanying drawings, in which:

Figure 1: a side view of an exemplary embodiment of a mobile device for producing a concrete mixture according to this invention, which in this example is arranged in a truck's semi-trailer, in the transport position,

Figure 2: View of the mobile device for the production of concrete mix of Fig. 1 from the side in the working position when ready for the production of concrete mix,

Figure 3: view of the mixing device of the mobile device for the production of concrete mixture of Fig. 1 with the mixing tank finished in the transport position,

Figure 4 is a similar view of the mixing device of Fig. 3, but with the mixing tank finished in the working position.

Examples of implementation of the invention

One of the possible examples of the embodiment is presented in Figure 1. The mobile device for preparing the concrete mixture in this embodiment is arranged in the chassis of a semi-trailer of a truck. According to other embodiments, not illustrated here, the mobile device may be arranged in the chassis of another suitable transport vehicle. An example of such a transport vehicle chassis is a truck, trailer, railroad car, etc. The mobile device for producing concrete mix according to this invention can also be formed as an autonomous unit that can be loaded into a vehicle properly adapted with a chassis, for example, truck, trailer, rail transport, that is, similarly, as Cargo containers, waste containers, etc. are formed and loaded. However, the term chassis, as used in the following description, should be understood in a general sense, as part of a means of transport, allowing its movement especially on solid surfaces or without cohesion.

In Figure 1, a mobile device is presented for the preparation of the concrete mixture comprising a frame 14 with a chassis 15, a filling tank 10 provided at the end of the frame 14 provided at the rear of the semi-trailer, a tank 11 of binder agent disposed at the opposite end of the frame 14 provided at the front end of the semi-trailer, and a mixing device (1) disposed between the filler tank 10 and the binder 11 tank. The front end and the rear end of the semi-trailer must be understood in relation to the point where the semi-trailer is coupled to the truck that provides the transport or to the driver's cab, indicated as the front end of the vehicle. In accordance with this invention, the filling tank 10 is placed at the rear end of the semi-trailer on the ground to easily refill the filling tank 10 during filling of the mixing device, even if the semi-trailer remains attached to the truck. One of the many advantages of the solution according to this invention is that the amount of concrete mixture that can be produced in the mobile device for the preparation of the concrete mixture is not limited by the size of the filling tank 10. It is important to note that, although the embodiment in the described example refers only to the mobile device according to the invention, arranged in the semi-trailer, the embodiment described here also refers to a mobile device according to any of the above or other possible variants, specifically to the realization of a mobile device for the production of concrete mix in the truck, trailer, railroad cars, container, etc. The use of the term "semi-trailer" in the description is not understood in any limiting sense, because for the essence of the invention it is irrelevant if the mobile device is formed as a semi-trailer, trailer, railroad car, container, etc., or if even its part is a truck or any other vehicle that allows the transfer of all the technology to the desired location. As already mentioned, it is also possible to form the mobile device according to the invention being arranged in a separate frame without chassis, when this frame, together with the mobile device disposed therein according to the invention, is loaded into a truck and it is transported to the destination, where it is placed on a suitable support or even on the ground. It is important to keep in mind that the provision of filler tank 10 at the rear of the semi-trailer allows easy refilling of the landfill, whose consumption in the production of concrete mixtures is the highest, for example, by means of a refill device, as described below, so that special loaders and similar equipment are needed at the construction site. The filling can be dosed in the recharging device directly from the loading area of the truck, if it is provided with a tilting mechanism.

As is obvious from the following description of an embodiment of this invention, the arrangement of the filler tank at the rear offers a number of benefits, first, a simple construction of the device to be used for recharging.

In addition, individual parts of the mobile device for the preparation of the concrete mixture according to this exemplary embodiment will be described.

The filling tank 10 is advantageously provided with a volume of approx. 15 m3 The filling, as already mentioned, for the purposes of this application indicates aggregate of gravel of various fractions, sand, but it can also be, for example, polystyrene that guarantees good insulation properties and other materials that, due to their characteristics , can be used as filler. Here it is important to mention the fact that, although in this embodiment there is only one filler tank, of course it is possible to create a mobile device according to this invention with multiple filler tanks, thus making it possible to prepare a concrete mix at use several different fillers that are dosed in the mixing device 1 according to the prescribed recipe for the production of the given concrete mixture. Similarly, the filler tank 10 can be provided as a reservoir for more filler fractions. The filling tank 10, in accordance with other advantageous versions of this invention, may be provided with vibrators for the complete emptying of the tank, convertible tarps to secure the material during transit and for the protection of materials, in particular the filling, against adverse weather, etc. These advantageous parts of the mobile device for the production of concrete mixture are not illustrated in the described embodiments described for a simpler understanding of the essence of the invention. The filling tank 10 can be advantageously provided with at least two fins on the lower side at the exit from the tank to the conveyor, thus offering the possibility of selecting the place for the filling tank 10, from which the filling will be dosed in the mixing device 1, for example, in the presence of several fractions in the tank. In addition, the filler tank 10 can be equipped with a partition to ensure that said fractions cannot be mixed together in their undesirable proportion. The number of fins and / or partitions may be different. Below the outlet, possibly also below the outlets of the filling tank 10, a conveyor belt, advantageously a conveyor belt with weight, is placed to dose the filling into the mixing device 1. The number of conveyor belts may be different and instead of the conveyor belt other suitable dosing devices may be used, for example, a screw conveyor, etc.

When the filling tank 10 has been completely filled with the magazine, the fins prevent the filling consumption of such spaces of the filling tank 10, which are not filled with the screw feeder 6. Advantageously, the tank section will be emptied, which can be filled by means of the screw feeder 6. Also, the loading of the dosing band that is considerably smaller has been reduced to a third.

The filling tank 10 according to its preferred embodiment is provided with a filling device for recharging material / materials in the filling tank 10, also during the operation of a mobile device according to this invention, for example directly on site of construction. Of course, it is also possible to fill the filling tank 10 using a loader, an excavator or other available techniques by pouring the filling from above, for example, by filling the filling tank 10 in sand pits, quarries and the like. When using the filling equipment, it is possible to fill the filling tank 10 simultaneously with the production in progress and without special equipment and the quality of the concrete mixture produced is not compromised. The filling tank 10 is firmly attached to the frame 8 of the semi-trailer. The filling device preferably consists of the receiving hopper 12 and two oblique screw feeders 6. The receiving hopper 12 is mobile, since it includes an actuation mechanism, here advantageously a hydraulic cylinder, which allows the up and down movement in the folded-deployed position and the lower pair of oblique screw feeders 6, which fill the second upper screw feeder 6, which is not mobile. To the receiving hopper 12 belong two other horizontal screw feeders 7 which are responsible for filling the lower oblique screw feeder 6, so that the receiving hopper 12 is completely emptied. The receiving hopper 12 is advantageously adapted for emptying the filling of trucks of different brands and sizes (types) using hand-folded adapters. The filling of the filling tank 10 is as follows: After deploying the receiving hopper 12, the truck with its platform will move backwards, over the receiving hopper 12 and starts the spill of the filling in the hopper. Simultaneously, two screw feeders begin to operate, which begin with the transfer of the filling to the filling tank 10. The truck must remain there until it is empty. Then the platform can be folded and the truck can exit. In the event that the materials are almost "exhausted" or that their consumption has stopped, the horizontal 7-screw feeders are reduced and the possible filling residues of the corners of the receiving hopper 12 are emptied. Not only the screw conveyor, but also other technical methods can be used to reload the filling.

The receiving hopper 12 in its folded position, intended for transport, is removed to the upper position and folded to the most compact dimensions possible. In the working position, that is, the deployed position, the receiving hopper 12 is resting against the ground. The transition of receiving hopper 12 from the deployed position to the folded position and vice versa is guaranteed by a hydraulic cylinder or other suitable device that lowers the receiving hopper 12 and ensures its inclination. In the transport position it is advantageous to mechanically secure the receiving hopper 12 against its movement to a lower position, that is, deployed. The mobile oblique feeder 6, in particular a screw feeder, connected to the receiving hopper 12, will fill the second fixed oblique screw conveyor, connected to the filling tank 10, whereby the load is transferred to this tank. The second oblique screw feeder is firmly attached to the filling tank 10 and is open at the bottom, whereby the filling leaves the screw conveyor as soon as possible and energy consumption is reduced. When in the filling tank 10 the filling quantity is sufficient to fulfill the order or when the possibility of recharging the tank 10 from above is selected, it is not necessary to deploy the filling equipment in production.

If the mobile device according to this invention contains multiple filler tanks, especially for mixtures of multiple fractions or for several fillers, this device can be provided with more filling devices.

The binder agent reservoir 11 is formed for the storage of the binder, which is advantageously cement, anhydrite and the like. The binder agent tank 11 has a volume of approximately 15 m3, which allows the production of a sufficient amount of concrete mixture. According to another preferred version, the binder agent reservoir 11 is equipped with a recharging device, which is advantageously the inlet tube, which allows the tank hose to be connected to the binder. As already mentioned, the arrangement of the binder agent tank 11 against the semi-trailer also ensures a uniform distribution of the weight in the semi-trailer, in which the mixing device 1, arranged in the center, further supports the uniform distribution of the weight in All wheels of the set. The binder agent reservoir according to another preferred embodiment of the invention is provided with a filter 13 for separating the binder from the air that is released during refill of the binder and enters the reservoir 11; This is particularly used when the tank binder is recharged with anhydrite or cement. The filter 13 includes filter cartridges and is formed for air cleaning or vibration cleaning of these filter cartridges. The filter 13 is further provided in its lower part with a flap to capture the binding agent. Through this fin, excess filter binder is emptied into the mixing device 1 during production. Advantageously, the filter 13 is also used during the production of the concrete mixture, when the dust generated during the filling of the mixing device 1 with the filling is sucked through the filter, so that it does not seep into the surroundings. The cleaning of the filter cartridges and the discharge of the excess binding agent in the mixing device 1 is preferably carried out automatically or semi-automatically following the instructions of the operator, without requiring manual operator intervention, which eliminates physically demanding handling. during manual assembly, disassembly and cleaning of filter systems. The binder agent reservoir 11 in this exemplary embodiment is fixedly mounted on the frame of the semi-trailer; You can also choose the variant with hydraulic lift of this tank since the screw feeders are short. The binding agent is dosed in the mixing device 1 by means of screw conveyors. The refill of the binder agent tank 11 can be carried out simultaneously with the ongoing production of the concrete mixture.

The mobile device for the production of concrete mixtures according to its other preferred embodiment can be equipped with a water tank, which is not illustrated in this example. The water tank according to a particularly preferred embodiment consists of two independent tanks that in this embodiment have the capacity of 500 liters each and are interconnected. The water tanks are advantageously arranged in the space of a cut segment of the filler tank and / or binder. Through the metering valve, water is supplied to the mixing device 1. The amount of water necessary to produce the concrete mixture can be weighed in the mixing device or measured by means of the flow measuring device, as is conventional in the preparation of concrete mixtures in known mixing devices. In the case of the flow meter, water can be supplied to the mixing device 1 simultaneously with another material, which is weighed in the mixing device 1, because the weight of another material is easily calculated by deducting the weight of the water supplied. For use in winter conditions, water advantageously passes through a heater such as the hydraulic oil tank, where it is heated. But if there is a sufficient source of pressurized water at the construction site, then the water tank would not need to be present or would not need to be used, because the mixing device 1 is filled with water directly from this source, of course, when they are maintained records on the amount / weight of water added. If there is not a source of pressurized water with sufficient pressure at the construction site, then water can be added to the mixing device (1) using a pump, which according to another preferred embodiment is a part of the equipment according to the invention .

The mobile equipment for the production of concrete mix according to this invention and according to another preferred embodiment can be provided with an additive dosing device for concrete mixtures and / or at least with scales to weigh the additives to the mixture of concrete. These additives are used to achieve Different specific properties of the concrete mix. Such additives are, for example, chemical additives, foam, fibers, etc. The dosage of additives to the concrete mixture is carried out directly in a mixing device 1 and, according to a preferred embodiment, is carried out so that the chemical ingredients, stored, for example, in small containers, typically 20 to 50 liters, arranged, for example in the frame 14, are dosed by pump or by gravity in the mixing device 1. The weights of the added liquid chemical additives are advantageously measured using a special flow meter, but it is also possible to verify the weight by weighing. For foam dispensing a foam generator is used. For fiber dosing in the mixture prepared for reinforcement, a fiber dispenser, known by conventional applications, can be used. The devices for dosing additives are not within the essence of the invention and are offered here only as examples of possible preferred embodiments of the mobile device according to the invention, but are not intended in any limiting sense. In general, it should be noted that the examples of embodiment only illustrate possible examples of use of the invention in practice, but the scope of protection of this invention is defined only by the patent claims.

In the mixing device 1, the individual components of the mixture are mixed in cycles and the finished mixture is discharged through the outlet into the tank of the finished mixture 2, which is placed under the mixing device 1. The preparation cycle of the concrete mixture begins with the filling of the mixing device 1 with individual components of the mixture according to the given recipe, then it is mixed to create the concrete mixture and the finished concrete mixture is discharged into the tank located under mixing device 1 Then the cycle is repeated - filling, mixing, unloading. The mixing device 1 is advantageously a single shaft type and includes several mixing blades arranged on the shaft and is provided with a hydraulically or pneumatically actuated spout. The mixing device 1 is advantageously provided with a weighing device for determining the weight of the individual components of the concrete mixture, which is more advantageously suspended in pressure measuring sensors that detect the weight of the concrete mixture for determine the weight of the individual components using known methods, for example, methods analogous to those of EP 1961539 to determine the weight of the components of the concrete mixture. For transport, the mixing device according to the example of the embodiment is raised and it is ensured that the voltage measuring transducers are not charged by the vibration of the mixing device, incurred during the drive. In order to increase performance, two separate mixing devices can be advantageously used in a side-by-side position.

According to the invention, a finished mixing tank 2 is disposed below the mixing device 1 and consists of at least one container, for example in the form of a channel. The finished mixing tank 2 is advantageous to guarantee a continuous supply and coverage in the production time of the mixture in the mixing device 1. The tank of the finished mixture 2 is advantageously formed to substantially surround the mixing apparatus to reduce space requirements, so that during transport the tank of the finished mixture is arranged around the mixing device 1, since it covers and occupies less space. At the bottom of the tank of the finished mixture is a stirring meter 8 and a screw feeder 9 with a pump 3 of the finished mixture.

The entire tank of the finished mixture 2 according to a preferred embodiment is arranged on the hydraulic cylinders, by means of which it is raised to the transport (folded) position or lowered just above the ground to the working position ( unfolded). Of course, it is possible to carry out the lifting and lowering of the tank of the finished mixture using another device, for example mechanical with manual or electric drive, etc. The upper part of the tank of the finished mixture 2 is advantageously provided with a filter, which prevents the penetration of larger fractions or particles into the pump. The agitation meter 8, which, for example, consists of two counter-rotating meters, but it is possible to use another appropriate solution, ensures agitation of the finished mixture; Advantageously, the finished mixture is continuously stirred and at the same time it is moved to the screw feeder 9. By means of the screw feeder 9 the pump 3 of the finished mixture is filled, which pushes the mixture through a hose towards the processing site. Of course, the finished mixture can be transported to the desired location from the tank of the finished mixture 2 by another method, different from that of the pump 3. The finished mixing tank 2 guarantees the continuous flow of the finished mixture to the pump 3 of the finished mixture, so that it is connected to the hose for the transport of the finished mixture (not shown) that for transport can be conveniently wound in a drum, like the hose for the water supply in the technology.

The aforementioned parts of the mobile device for the production of concrete mix are located in the frame of the semi-trailer 14 and their respective actuators can be hydraulic, pneumatic or electric. In the exemplary embodiment, as a driving source, the semi-trailer tractor engine is advantageously used, on which the mobile device according to this invention is placed. It is also possible, in the case of the installation of a mobile device according to this invention in a truck; Use the engine of this truck. The mobile device according to this invention can also be equipped with an independent electricity generator or with a hydraulic pump motor, independent of the tractor or truck engine.

The advantages of the mobile device according to this invention, in addition to those already mentioned, are the following:

1. The amount of material in the trailer is sufficient to meet most orders - no need to fill in the materials.

2. The technology alone will supply a sufficient quantity of binding agent and the filling will be complemented at the construction site and in the case of larger orders - more than 15 m3 of the mixture - production can be ensured without the need for mechanisms special in refill refill.

3. The technology alone will supply a sufficient amount of filler and the binder will be complemented at the construction site and for larger orders, generally above 15 m3 of mixture, the binder will be recharged from a transport binder tank, so that the tank through a hose is connected to the binder tank and the binder is transported there by a hose and a transport pump.

4. The technology guarantees the refilling of the filler and the binder at a construction site (for large orders) without the need for special mechanisms.

This variability in the use of technology facilitates the logistic planning of material flows for production and reduces overall production costs.

The actual production process of the concrete mixture in the mobile mixing device according to this invention is similar to that of other mixing devices. The mixing device is gradually filled with the individual components of the mixture, stirred and the resulting mixture is discharged into the tank of the finished mixture, which is installed under the mixing device. From there, the mixture is pumped or transported to a place designated for storage.

The mobile device according to this invention, with the mixing device arranged between the binder agent tanks and the filling, advantageously, the mixing device is located in the center of the frame, in which this device is installed according With the invention, it has the advantage of providing the possibility of combining the advantages of the different types of known devices mentioned above for the production of concrete mix, while reducing operating costs and, in particular, eliminating the above-mentioned drawbacks of these known devices to produce the concrete mix. List of reference marks:

1. Mixing device

2. Mixing tank finished

3. Mixing pump finished

4. Binder agent screw feeder

5. Filler band feeder

6. Oblique filling screw feeders

7. Horizontal filling screw feeders

8. Agitation meter

9. Screw feeder

10. Filling tank

11. Deposit of binder

12. Automatic filling fill receiving hopper

13. Filter

14. Marco

15. Chassis

Claims (4)

1. The mobile device for producing a concrete mixture consists of a frame (14) provided with a chassis (15) or a frame (14) provided for a connection with a chassis (15), in which at least one tank (11) binder agent and at least one filler tank (10) are arranged in the frame (14), where a mixing device (1) is also attached to the frame (14), in which the tank (11 ) of binder and filler tank (10) are provided with feeders to feed the binder and binder into the mixing device, in which the mixing device (1) is disposed between the filling tank (10) and the binder agent tank (11) and in which the filling tank (10) is disposed at the rear end of the frame (14), in which the binder agent tank (11) and the filling tank (10) they are provided in their lower part with respective feeders to feed the binder and the re filled in the mixing device, characterized in that the tanks (10, 11) together with the respective feeders are provided essentially above the frame (14), while the mixing device (1) is provided essentially below the frame (14 ), the mixing device (1) being provided with a discharge opening in its lower part in which under said discharge opening a finished mixing tank (2) is arranged, where the finished mixing tank (2) is it forms as a channel and a box of the mixing device (1), in which in the transport position, the finished mixing tank (2) surrounds the mixing device (1) that is designed to be lowered below the device (1) mixing in order to increase its volume, where the finished mixing tank (2) is provided in its lower part with a stirring device (8) having a pump (3) of the finished mixture. 2. The mobile device for producing a concrete mixture according to claim 1, characterized in that the mixing device (1) is arranged in the tension meters to detect the weight of the individual components of the concrete mixture and is equipped with a locking device to release the voltage measurement sensors when transporting or storing the entire device. 3. The mobile device for producing a concrete mixture according to claim 2, characterized in that the mixing device (1) is provided for lifting in order to ensure that the voltage measurement transducers are not charged by the vibration of the mixing device, incurred during the journey. 4. The mobile device for producing a concrete mixture according to one of claims 1 to 3, characterized in that it contains two separate mixing devices in a side-by-side position in order to increase the yield.