WO1999011378A1

WO1999011378A1 - Concrete recycling facility for recycling waste concrete from unset concrete residues and residues obtained during the cleaning of concrete producing or transporting devices

Info

Publication number: WO1999011378A1
Application number: PCT/EP1998/005195
Authority: WO
Inventors: Jürgen Bozenhardt
Original assignee: Bozenhardt Juergen
Priority date: 1997-09-03
Filing date: 1998-08-17
Publication date: 1999-03-11
Also published as: DE19738471A1; EP1044071A1; AU9263098A

Abstract

The invention relates to a concrete recycling facility for recycling waste concrete from unused unset concrete residues and from residues resulting from the cleaning of concrete producing or transporting devices such as truck mixers, mixing plants and concrete pumps in construction sites, concrete plants and recycling facilities. The invention seeks to provide a concrete recycling facility which ensures recycling of all waste concrete components and their reintroduction into the production process in an automatically controlled and monitored facility, without having to conduct the individual steps of the method in separate facilities. Furthermore, said facility should also ensure minimization of energy and material consumption and costs and should operate as far as possible free from the inappropriate influence of subjective factors. The inventive facility is a modular construction system mounted in a flexible frame unit in which all components of the facility are arranged variably and all rotating modular units operate fully externally from the waste concrete to be recycled and are supported, guided and driven by a single drive mechanism. The inventive facility can be controlled and monitored fully automatically by integrating conventional electronic control elements.

Description

Concrete recycling plant for the reprocessing of residual concrete from unused fresh concrete residues as well as from residues in the cleaning of concrete production and transport facilities.

The invention relates to a concrete recycling plant for the reprocessing of residual concrete from unused fresh concrete residues and from residues which arise in the cleaning of concrete manufacturing and transport facilities such as truck mixers, mixing plants and concrete pumps on construction sites, in concrete plants and reprocessing plants.

In fresh concrete production, an average of 2.5% of the total production quantities are returned as residual quantities for reprocessing in the concrete plants or reprocessing plants. The reprocessing of these residual amounts is particularly problematic because the water contained in the remaining amounts is strongly alkaline and mixed with a high proportion of cement. The introduction of this cement-containing water into the sewage system is prohibited for reasons of environmental protection. The result is labor and material consuming and therefore costly

Reprocessing procedures and / or irreparable environmental damage.

Reprocessing systems are known in which the solid components are washed out of the residual concrete with the addition of rinsing water and their classification in, for example, closed washing drums, trough prewashers, vibrating sieve coarse separators or inclined dewatering screws with and without a classifying sieve with a downstream clarifier for the absorption of the cement-containing water. In these systems, the cement-containing water must be moved in the downstream clarifying parts by agitators so that it does not set. The sludge obtained in these processes must be removed from the pits and disposed of as special waste. This is costly and material-intensive and environmentally unfriendly. Washing-out devices for concrete recycling plants with a mixing and conveying device in the form of a screw arranged in a container and at least two scooping devices are known from DE 42 1 5 1 74 C 1. Concrete residues are fed from concrete mixer trucks with rinsing water into the container of the washing device, where they are conveyed to the end of the container by means of a rotor in the form of a screw conveyor and sent for recycling with the bucket elevators. A ring is attached to one end of the screw conveyor and is mounted on several rollers which are arranged on the trough walls outside the water. The screw conveyor rotates with the ring and does not need a drive shaft, which eliminates sealing problems for shaft bearings in cement-containing water. The screw conveyor is driven by a motor-driven toothed pinion, which is in engagement with a toothed bridge arranged on the circumference of the ring. This construction is very energy-intensive and requires a correspondingly strong drive motor which is associated with high power consumption.

Washing-out devices for concrete recycling plants with a mixing and conveying device in the form of a screw arranged in a container and at least two scooping devices are also known from DE 1 95 03 069 A1, in which the mixing and conveying device and the scooping devices are from a common chain drive are driven. The mixing and conveying device has a gear wheel on one end face for receiving a drive chain. The gear wheel is mounted on guide rollers arranged on the container wall. The mixing and conveying device is connected via a shaft to a scoop wheel, on the end of which a second gear wheel for receiving a second drive chain is arranged and which ends with a second end ring, which is also mounted on a guide roller arranged on the end wall of the container. Guide rollers and drive are arranged essentially outside the residual concrete and are therefore less prone to failure. The chains, however, absorb significant amounts of solid and liquid components, which displace the chain links and destroy the drive sprockets, as a result of which Drive is very prone to failure. The central shaft bearing between the screw conveyor and the scoop also increases the susceptibility of this system to faults.

In the washout devices for concrete

Due to the fact that everyone has free access to reprocessing plants, there is also the risk that excessive amounts of residual concrete but also foreign bodies of other types can get into the container, which can overload the plant and put it in a state in need of repair. The result is high failure rates and considerable repair costs. In addition, the resulting cement-containing dirty water must be directed into separate pits or devices and kept in motion by means of motor-driven mixing devices, since the concrete residues set in still water. Such a mixing device is known from DE 44 03 262 A1. It consists of a trough-shaped container in which a mixing device consisting of two oppositely operating spirals is arranged, which are adapted to the trough shape of the container at a short distance from the underside of the container. The mixing spirals are cantilevered and supported on races on idlers, which are arranged on the end walls of the container, and driven by a chain drive. The mixing spirals working in the opposite direction to the center of the container prevent deposits on the container edges, but in addition to the washing-out devices, the devices require an additional drive unit and thus additional energy and cost. Outside, the cement-containing water must be filled and emptied into the separate mixing device, which requires additional transportation.

In the known washing-out systems as well as in the mixing systems, the rotating parts of the system are carried by several rollers which act on the

Container walls are arranged. This leads to strong frictional forces, which require powerful drive units. For the different process sequences, several drives are required, which must be operated, operated and monitored independently of one another. This is energy, material and expensive. In addition, improper operation of the systems cannot be ruled out because they are easily accessible are. Overloading of systems and the resulting failure of the units and their repair are the rule.

It is therefore an object of the invention to provide a concrete recycling plant which ensures the reprocessing of all components of the residual concrete and their return to the manufacturing process with an automatically controlled and monitored system without the separation of individual process steps and with minimized energy, material and cost expenditure and the is largely independent of improper subjective factors.

The object is achieved by a concrete recycling plant for the reprocessing of residual concrete with the characterizing features of claim 1.

The complete arrangement of the system's modularly arranged and flexibly combinable units allows the integration of all process steps in one system. The arrangement of the modular units in a flexible frame unit according to claims 2 to 6 also allows a spatially variable arrangement of the individual modules according to the space requirements of the user. If required, the user can also arrange the space part of the frame unit in which the conveyor units are arranged, together with the feed basin and the flushing gallows, at right angles to the other space parts of the frame unit. The individual room parts of the frame unit according to claim 2 can be closed if necessary by wall surfaces, whereby access to the system by incompetent operating personnel can be excluded.

The structural design of the feed basin with a grating according to claim 7 does not allow the ingress of foreign bodies which destroy the aggregates and, because of its volume, has a storage capacity which allows the truck mixer to be dispatched at short notice. Electronic vehicle detection automatically triggers the supply of rinse water to the system parts and, if necessary, the drive to be set to full power. The uncontrolled Filling excessive amounts of residual concrete into the feed basin can only result in the overflow of the feed basin, since the electronic fill level monitoring in the mixing and washing-out system only allows the supply of residual concrete in the quantities that the system can process. An overload of the washing and mixing system as well as the drive and the conveyor units is therefore excluded.

The driver can manually feed the flushing water into the truck mixer drum using a hand switch on the flushing boom.

To be emphasized is the combined construction of the mixing and washing device in a modular unit and its arrangement in a separate basin as well as its complete storage and guidance on a drive outside the residual concrete according to claim 8. This is particularly due to the structural design of the washing device according to claim 9 to 1 8 given, in which the washing device with the classifying sieve and the scooping devices are connected to one another via a system of drive and receiving rings and support tubes such that a central storage of the functional elements and their continuous operation within the residual concrete is unnecessary. The arrangement of the classifying sieve in the system according to the invention of supports and support rods according to claims 1 3 to 1 6 also allows a short-term replacement of the classifying sieve and the classification or recycling according to different grain sizes of the solid components of the residual concrete in the reprocessing. The direct coupling of a lightweight frame construction according to the invention according to claims 1 9 and 20 ensures that the mixing device is carried by the drive rings of the washing device and is kept rotating in the same interval as the washing device by means of a single drive, so that the previously separate mixing process takes place in There is no need for pits. The basin separately enclosed by the frame unit according to claims 22 to 25 divides the system into two parts by means of a separating part, in which the cement-containing water is moved until it is returned to the manufacturing process and pumped out if necessary, and into a pre-wash and post-wash chamber in which the solid components of the residual concrete over the Screw shovels are conveyed to the classifying sieve, separated into coarse and fine-grain fractions via a trough in the basin and transported to a divided drainage trough with two scooping devices for post-washing and reprocessing.

The control of the modular units of the system by a drive according to claim 26 is particularly advantageous. The arrangement of all functional elements of the drive on the frame unit according to claims 27 to 30 outside of the media to be processed not only ensures considerable energy and cost savings, it also ensures that the drive parts cannot be adversely affected and destroyed by the aggressive cement water. The storage of the washing and mixing device on both sides of only one friction wheel ensures easy mobility of the construction, which also makes the use of the previously required powerful motors superfluous.

The automatically controlled sequence of the process steps in the integrated recycling system according to the invention by means of conventional electronic control elements permits a process sequence that is largely independent of subjective factors and the saving of operating personnel for the previously required separate process sequences during reprocessing. It enables the saving of work equipment, transport routes and time spent on transport between the previously separate and manually operated processing systems. The expensive ancillary construction costs for the construction of the septic tanks as well as the energy and personnel expenses for the operation and maintenance of the pits are eliminated. Additional screening and separation systems are no longer required. The simultaneous cleaning of the pumps, pipe systems, mixing and washing-out system parts, as well as the task and work basin, which takes place automatically and independently of the subjective influencing factors, also guarantees a significantly longer service life for all machine and system parts, control elements and means of transport, as well as high time savings for the previous ones manual cleaning. The destruction of plant and machine parts due to improper operation such as overfilling the feed basin and Overloading of the systems is prevented by the electronic control and monitoring as well as the optimal dimensioning of the system parts.

Finally, there is a considerable advantage of the electronically controlled and monitored reprocessing plant in that its use is guaranteed in terms of time and space, independently of one another, by the concrete plant and by truck mixer drivers starting up.

The invention is described below with reference to an embodiment. The drawings show in

1 is a front view of a concrete recycling plant according to the invention without frame walls and basin,

2 shows the top view of a concrete recycling plant according to the invention without frame walls and basins,

3 shows the side views of a concrete recycling plant according to the invention in section A-A and in section B-B from FIG. 1,

Fig. 4 is the front view of the frame unit of a concrete recycling plant according to the invention without

Frame walls,

Fig. 5 is a plan view of the frame unit of an inventive

Concrete recycling plants without frame walls,

6 shows the side views of the frame unit of a concrete recycling plant according to the invention in section A-A and B-B from FIG. 4,

7 is a top view of the completely assembled washing device shown as a detail, 8 shows the side view of the washing device in section BB from FIG. 1,

9 shows the side view of a drive ring in section C-C from FIG.

1 0 is the front view of a drive ring,

1 1 is a side view of a receiving ring in section C-C of Fig. 1 2,

1 2 is the front view of a receiving ring,

1 3 is a front view of a support,

1 4 is a side view of a support,

Fig. 1 5 the top view of a support flange in section A-A

Fig. 1 3,

1 6 is the front view of a support rod,

1 7 is a plan view of a support rod,

1 8 is the front view of a worm shovel,

1 9 is a plan view of a worm shovel,

20 shows the front view of the mixing device in section C-C from FIG. 2,

21 shows the side view of the mixing device in section B-B

Fig.1,

22 shows the side view of the mixing device in section D-D

Fig.1, 23 the front view of the basin in section EE from FIG. 2,

24 the side view of the pelvis,

25 shows the side view of the drive in section A-A from FIG. 1,

Fig. 26 is the front view of the drive in section C-C

Fig. 2,

27 shows the side view of the drive in section B-B

Fig.1,

the same parts are identified with the same numbers.

1 and 2 are the front view and the top view of a concrete recycling plant in a linear arrangement form of the modular units 1 1 and 1 2 according to the invention, the drive 9 and a basin 1 6 and a divided drainage channel 1 7 in and on the modular frame unit 1 3 recognizable. The basin 1 6 and on the room parts 1 3 'and 1 3 "of the frame unit 1 3 wall surfaces which can be arranged as required were not shown in more detail for reasons of visual clarity for the viewer. The frame 22 composed of conventional steel profiles is shown in FIG and 5 mounted on a base frame 1 8. In the room parts 1 3 ', 1 3 "and 1 3'" of the frame unit 1 3, which can be easily separated or linked as required by the user, the modular units 1 1 and 1 2. In the linear arrangement form that is preferably shown, the feed basin 2, which is made of sheet steel, for example, is part of the modular unit 11 with its rear wall 2 '"on preferably two brackets 2""on the front side by the horizontal frame planes F and I and by vertical frame planes A and B limited space part 1 3 'of the frame unit 1 3 arranged. At a right angle to the rear wall 2 '", the feed basin 2 is closed on both sides with two side walls 2' which essentially form an acute-angled triangle and an end wall 2 'which closes with the diagonals of the side walls 2'. The end wall 2 "forms the Bottom of the feed basin 2 and also serves as a kind of slide. In the bottom area of the feed basin 2, a suction nozzle for a concrete pump 5 "is arranged in the rear wall 2" and a grating 2 """is arranged above the suction nozzle parallel to the filling level of the feed basin 2, through which the penetration of objects which destroy the conveying units can be avoided . Above the feed basin 2 there is a pipeline with openings directed into the feed basin 2, with which rinse water is supplied in the feed basin 2 to dilute the residual concrete. The pipeline is led out of the closed side wall of the room part 1 3 ', not shown in the drawings. A flushing water pipe 1 'is preferably arranged vertically from the top wall of the room part 1 3', also not shown, which is angled away from the room part 1 3 'at an arbitrarily definable height and forms a flushing gallows 1. If necessary, two flushing gallows 1 can also be provided at this point. Rinse water is removed via the rinse water line 1 'for cleaning, for example, the drum of a truck mixer. For this purpose, a manually operated switch is arranged in a visible place for the driver. In the room part 1 3 'of the frame unit 1 3, which is closed with walls, not shown in the drawings, are, for example, a concrete pump 5 "with an output of 11 kW, a concrete pump 5' of the type 3808-381 2 / H with an output of 7.5 kW, a 5 "" flushing water pump of type 3808-3825 / SL with an output of 5.5 kw and a second 5 "" flushing water pump of type 3808-3825 / SL with an output of 5.5 kW with conventional Pipelines, pipe sockets, flanges, pipe bends etc. connected in such a way that the concrete pump 5 "takes over the diluted residual concrete from the feed basin 2 and transports it via a pressure pipe 1 5 into the room part 1 3" of the frame unit 1 3. The concrete pump 5 'is connected in such a way that it ensures the return of the cement-containing water flowing out of the residual concrete into the manufacturing process, the concrete pump 5 "conveys the diluted residual concrete from the feed basin 2 for washing out and classifying into its coarse and fine components in the room part 1 3 ", the rinse water pump 5"'supplies the rinse boom 1 with rinse water and the rinse water pump 5 "" transports rinse water into the feed basin 2. The great advantage of the conveying units 5 arranged in the room part 1 3' consists in the closability of the room part 1 3 'by attaching wall elements. In this way, access to the conveyor units 5 is only guaranteed by competent personnel. The arbitrary changing of the performance parameters set on the conveying units 5 by incompetent people is not possible, as a result of which the overloading of pump motors, drive or other system parts can be excluded. In the linear arrangement form of the concrete recycling plant according to the invention, the space part 1 3 "delimited by the horizontal frame levels F and I and the vertical frame levels B and D adjoins the space part 1 3 '. The supports 1 9, Trusses 20, and pipe supports 21 of the frame 22 are arranged so that the room part 1 3 "is detachably connected to the room part 1 3 '. The frame elements are connected to one another in such a way that the room part 1 3 "can be separated again in a vertical frame plane C. In the vertical frame plane B in the central axis X, a pipe support 21 with sub-beams 1 9 'to the room part 1 3" is arranged on which a from the room part 1 3 'guided and coupled to the concrete pump 5 "pressure pipe 1 5 is held or carried. In the embodiment, the room part 1 3" is designed in length and width so that it has the modular unit 1 2 in a complete version and can hold a separate basin 1 6 that is approximately the same length. Due to the variability of the construction of the frame unit 1 3, the user can also obtain a system variant shortened by the length of the mixing device 4 if, for example, he wants to use an existing pit for the cement water. The cement water is then discharged directly from the outflow device into such a pit. The pool 1 6 according to FIGS. 23 and 24, not shown in more detail in FIGS. 1 and 2, consists of a semicircular floor 1 6 'running over its entire length, on the two opposite upper edges of which two side walls 1 running perpendicular and parallel to each other close 6 '". Two end walls 1 6" provided with rectangular cutouts close the basin 1 6 in the vertical frame levels B and D. In the interior of the basin 1 6 there is a partition 40 in parallel to the end walls 1 6 "in the frame plane B. the frame plane D a partition 41 and perpendicular to the end wall 1 6 "in the frame plane D a groove 42 is arranged. The partition 40 divides the pool 1 6 to at a height that corresponds to approximately two thirds of the total basin height into a clarifying part 10 and a pre-wash and post-wash area of the washing device 3. The partition 41 divides the pre-wash and post-wash area in the pool 1 6. The perpendicular to the end wall 1 6 "in the frame plane The trough 42 arranged projects into the interior of the basin 1 6. The basin 1 6 is fixedly mounted with the base 1 6 'on the base frame 1 8 of the frame 22. A conventional emergency drain valve is provided at a suitable location on the base 1 6'. The particular advantage of the design of the pool 1 6 according to the invention consists in the combination of a clarifying part 1 0 and a pre-wash and post-wash area in a self-contained work space, which combines the work steps previously carried out in separate plants, washing out, classifying and mixing the cement-containing water Pits, guaranteed in a system The modular unit 1 2 is in the selected version 7 and 8, a mixing device 4 shown in FIGS. 20, 21 and 22, a classifying screen 8, not shown, and preferably two scooping devices 6 and 7. The chosen construction according to the invention of the two plant units washing device 3 and mixing device 4 ensures, in addition to the combination of previously separate process steps such as washing, classifying and mixing, an assembly of the parts outside the frame unit 1 3. Two drive rings 23, for example made of sheet steel, and preferably three are parallel to one another the drive rings 23 arranged receiving rings 24 according to FIGS. 9 to 1 2 by, for example, eight, over the inner circumference of the radially extending annular surfaces 23 'of the drive rings 23 and the annular surfaces 24' of the receiving rings 24 distributed guide tubes 25 made of unrefined steel tube connected to each other. Ladle cups 29, which form the two ladle devices 6 and 7 of the washing device 3, are mounted between a drive ring 23 and a receiving ring 24 and between the two further receiving rings 24 over the outer circumference of the annular surfaces 23 'and 24'. On the guide tubes 25 parallel to the annular surface 24 'of the third receiving ring 24 and the annular surface 23' of the second drive ring 23 are made of sheet steel and are made four times to their surface plane W. angled, circular segments formed worm blades 28 according to FIGS. 1 8 and 1 9 pushed on. A worm shovel 28 sits on three guide tubes 25, the following on one of the first three and on two further guide tubes 25 etc., the distances between the worm blades 28 being ensured by spacer tubes 27 which are also to be fitted onto the guide tubes 25. Completed, the assembled worm blades 28, distributed over the outer circumference of the ring surfaces 23 'and 24' according to FIG. 7, form an interrupted transport worm between the third receiving ring 23 and the second drive ring 24. In the same area there are preferably each guide tube between the worm blades 28 25 at least two supports 26 of different lengths, for example consisting of a square profile, according to FIGS. 1 3 to 1 5 are arranged in the radial direction, on the free end face of which there is a flange 26 ″ at an acute angle c <to their longitudinal axis Y. the shorter supports 26 are arranged parallel to the annular surface 24 'of the third receiving ring 24 and the longer supports 26 are arranged parallel to the annular surface 23' of the second drive ring 23. Support rods 30 according to FIGS. 1 6 and 17 are attached to the flanges 26 "of the supports 26 assembled. The support rods 30, for example made of non-tempered steel tube, are angled over a definable range at an obtuse angle P to their longitudinal axis Z and have holes 30 'distributed over the entire length, with which they can be connected to the flanges 26 ″ of the supports 26 and by means of conventional connecting means their angled area on the circumferential surface 31 'of an annular flange 31 are non-positively connected in such a way that they form a truncated cone-shaped cavity form that can be equipped with differently sized passages, so that classifications according to required grain sizes can be easily realized. The washing device 3 according to the invention has the great advantage that all parts of the system are not stored centrally ind, which avoids the considerable wear and tear of the anie parts caused by the previous central bearings and eliminates the frequent repair work and maintenance work be minimized. The frame 32 of the mixing device 4, formed from supports 33, supports 34, tensioning tubes 35, bridges 36 and plates 37 and sheets 38 according to FIGS. 20 to 22 and made for example from steel profile parts, forms an isosceles quadrilateral in its outer contours, that on its one end face is brought together to form a projecting cylindrical frame part 32 'and is fastened to an annular flange 39 with plates 37 arranged at the end of the cylindrical frame part 32'. After the mixing device 4 and the washing device 3 are mounted, they are connected to one another via the two ring flanges 31 and 39. The mixing device 4 according to the invention is characterized by a light construction. Due to the mechanical coupling with the washing device 3 according to the invention, both units can be operated simultaneously by means of a single drive 9, which results in considerable cost savings when purchasing the drive units and, above all, the saving on maintenance personnel. The drive 9 according to the invention is shown in more detail in FIGS. 25 to 27, the arrangement of its components being particularly emphasized. All components of the drive 9 according to the invention formed from commercially available individual parts or products are arranged on the cross members 20 of the vertical frame levels C and D in the horizontal frame level F of the frame unit 1 3 outside the residual concrete to be processed in the pool 1 6. The drive 9 manages with only two friction wheels 45, on which the washing device 3 according to FIG. 26 with the inner sides of the ring belts 23 ″ of the drive rings 23 is mounted on both sides.

This design considerably minimizes the friction that has been caused up to now by the use of up to six friction wheels 45. The minimized friction makes it possible to use a drive motor 43 with a significantly lower power volume than before. Nevertheless, the mixing device 4, which can be mechanically coupled to the washing device 3, can be operated simultaneously with this less powerful drive motor 43. Another advantage is that the friction wheels 45 are mounted on the frame 22 like all other drive components. Compared to the known arrangement of the friction wheels 45 on the inside of the two end walls 1 6 "of the pool 1 6, the Drive 9 according to the invention has a substantially higher stability, since the load of the washing device 3 is held vertically on the angular profile of the frame 22, as a result of which the end walls 1 6 "of the basin 1 6 are relieved and maintenance work on the system can be carried out more easily.

After the frame unit 1 3 in the room part 1 3 'is completed with the modular unit 1 1 and in the room part 1 3 "with the basin 1 6 of the modular unit 1 2 and the drive 9, the frame unit 1 can be made over a room part 1 3'" 3 a subsidy for the coarse and fine grain portions to be transported from the system can be arranged. In the exemplary embodiment, a divided drainage channel 1 7 is provided for this, which receives the coarse and fine constituents of the residual concrete conveyed by the two scooping devices 6 and 7 from the pool floor 1 6 'of the pre-washing and post-washing area of the pool 1 6, from where they are used for further use can be. The divided drainage channel 1 7 is arranged so that it intersects the vertical planes of the drive ring 23 in the vertical frame plane D and the two receiving rings 24 and protrudes so far into the space part 1 3 "that it ends with the vertical plane of the third receiving ring 24. Instead of the drainage channel 1 7, a conventional conveyor such as a conveyor belt can also be used.

When returning residual concrete, for example from a truck mixer, the vehicle drives up to the feed basin 2 and empties the residual concrete located in the vehicle drum into the feed basin 2. A paint detection device located at a suitable point triggers the automatic dilution of the residual concrete with rinse water, its transport to the washing device and if necessary, switch on the drive 9 to full power. Rinse water from the clarifying part 1 0 of the basin 1 6 is portioned into the feed basin 2 by means of the rinse water pump 5 ″ and the residual concrete thus diluted is portioned by means of the concrete pump 5 ″ from the feed basin 2 via the pressure line 1 5 into the prewash and post-wash area of the basin 1 6 transported to the washing device 3. Due to the rotating movement of the washing device 3, the coarse-grained fractions fall out of the sieve cone 8 onto the trough 42 in the basin 1 6 into the post-washing area behind the partition 41, from where they are connected to the Scoop device 6 are transported to one half of the divided conveyor trough 1 7. The fine-grain constituents of the residual concrete fall to the floor in the prewash area of the pool 1 6, from where they are conveyed to the second part of the divided drainage channel 1 7 by means of the scoop device 7. The cement-containing water remains up to the height of the partition 40 in the prewash area of the basin 1 6. If the water level rises further, the cement-containing water runs over the partition 40 into the clarifying part 10 of the basin 1 6 where it is constantly in motion by the rotating movement of the mixing device 4 is held. From there, the cement-containing water can be returned to the manufacturing process by means of the concrete pump 5 ', or can be conveyed into the feed basin 2 by means of the flushing water pump 5 "" via the flushing boom 1 for cleaning the vehicle drum or for diluting the residual concrete via the flushing water pump 5'". The portioned delivery of diluted residual concrete from the feed basin 2 is controlled by an electronically controlled level indicator in the basin 1 6. In this way, the system cannot be overfilled and the drive 9 cannot be overloaded. If the truck mixer is emptied, it gives off when moving away from the feed basin 2 the contact to the vehicle detection is released, which automatically starts a run-on time for the flushing water pump 5 '", which is reset until the power measurement of the concrete pump 5" switches off the flushing water pump 5'"and the concrete pump 5" comes to a standstill with a delay switching off the concrete pump 5 "switches the drive the divided drainage channel 1 7 with a time delay and the drive 9 switches to intermittent operation, whereby the cement-containing water is kept in a uniform suspension. The electronic level monitoring in the pool 1 6 is designed so that it can be detected and regulated in the concrete plant. If the defined minimum fill level in the pool 1 6 is undershot, this is regulated by a conventional, and therefore not described, automatic fresh water make-up. The concrete recycling plant according to the invention is secured by its electronic control and monitoring in such a way that the plant works largely independently of subjective influencing factors and untrained personnel cannot cause material and financial damage due to incorrect operation. Thanks to the modular structure, the system is always on Customizable conditions and requests adaptable. The automatic switchover of the drive 9 between intermittent operation or full power also ensures high energy savings.

List of the reference marks used

1 flushing gallows,

1 'rinse water supply,

2 feed tanks,

2 'side wall of the feed basin,

2 "front wall of the feed basin,

2 '"rear wall of the feed tank,

2 "" consoles,

2 '"" grating,

3 washing device,

4 mixing device,

5 conveying units, 5 'concrete pump,

5 "concrete pump,

5 '"rinse water pump,

5 "" rinse water pump,

6 scoop device,

7 scoop device,

8 classifying sieve,

9 drive,

10 clarifying section,

1 1 modular unit,

12 modular unit,

13 frame unit,

1 3 'space part of the frame unit,

13 "space part of the frame unit,

1 3 "space part of the frame unit,

1 5 pressure pipeline,

1 6 pools,

1 6 'pelvic floor,

1 6 "front wall of the pelvis,

16 '"side walls of the pool,

1 7 drainage channel,

1 8 base frame of the frame unit,

1 9 carriers, 'Sub-beam, cross member, pipe support, frame, drive ring,' Ring surface of the drive ring, "ring band, '" holes in the drive ring, mounting ring,' ring surface of the mounting ring, "holes in the mounting ring, guide tube, supports, 'concave recess of the supports," flange on the supports, spacer tubes, worm shovel, 'breakthroughs of the worm shovels, scoop, support rod,' holes in the support rod, ring flange, 'end face of the ring flange, frame of the mixing device,' cylinder on the frame, carrier, support, tension tube, bridge, plate, sheet metal, Ring flange, partition in the pool, partition in the pool, channel in the pool, 43 engine,

44 drive shaft,

45 friction wheel,

46 friction wheel shaft,

47 console,

48 small sprocket,

49 large sprocket,

50 roller chain,

51 pressure arm,

52 tuning plate

A vertical plane of the frame unit,

B /

C /

D

horizontal plane of the frame unit,

G H

X central axis of the frame unit,

Y longitudinal axis of a column,

Z longitudinal axis of a support rod,

W Longitudinal axis of a worm shovel.

Claims

claims

1. Concrete recycling plant for the reprocessing of residual concrete from unused fresh concrete residues and from residues in the cleaning of concrete production and transport facilities, consisting of a flushing boom (1), a feed basin (2), a washing device (3) with a mixing device (4) and conveying units (5), scooping devices (6, 7), classifying sieve (8), a drive (9) and a clarifying part (10), characterized in that the flushing boom (1), the feed basin (2) and the conveying units (5) a modular unit

(11), the washing device (3), the mixing device (4), the classifying screen (8) and the scooping devices (6, 7) form a modular unit

(12) form that the drive (9) and the modular units (11) and (12) as a modular system on and / or within a flexible frame unit

(13) are mounted, the modular unit (12) being completely supported and guided on the drive (9) and within a separate basin (13) enclosed by the frame unit (13) and divided into a clarifying part (10) and a pre-wash and post-wash area 16) works that by integrated arrangement of conventional electronic

Control elements the entire system is controlled and monitored fully automatically, the drive (9) works completely outside the residual concrete to be recycled and drives all modular units (11) and (12).

2. Concrete recycling plant for the recycling of residual concrete according to claim 1, characterized in that the frame unit (13) from the room parts (13 '), (13 ") and (13'") from a base (18) and one arranged thereon , consisting of beams (19), crossbeams (20) and pipe supports (21) frame (22) and that the frame (22) by vertical frame levels (A, B, C, D, E) and horizontal frame levels (F, G, H, I) is subdivided.

3. Concrete recycling plant for the recycling of residual concrete according to claim 2, characterized in that the space part (1 3 ') of the frame unit (1 3) through the vertical frame levels (A) and (B) and the horizontal frame levels (F) and ( I) is limited and closed by wall surfaces on all sides and that the wall surfaces of the room part (1 3 ') for receiving and fastening the modular unit (1 1) with openings for carrying out and fastening various pipes, pipe bends, connecting flanges, flaps, pipe clamps and Consoles (2 "") and a lockable door are provided.

4. Concrete recycling plant for recycling residual concrete according to claim 2, characterized in that the space part (1 3 ") of the frame unit (1 3) through the vertical frame levels (B) and (D) and the horizontal frame levels (F) and ( I) is limited, the drive (9) is attached to the frame (22) in the region of the horizontal frame plane (F), that the modular unit (1 2) between the vertical frame levels (C) and (D) on the drive (9) is stored and guided and extends into the basin (1 8) attached to the separate basin (1 6) and that the room part (1 3 ") in the vertical frame plane (B) is separably connected to the room part (1 3 ') and in the vertical frame level (C) is separable.

5. Concrete recycling plant for the recycling of residual concrete according to claim 2, characterized in that the space part (1 3 '") of the frame unit (1 3) through the vertical frame levels (D) and (E) and the horizontal frame levels (F) and (G) is limited and that a divided drainage channel (1 7) is arranged in the room part (1 3 '") that on the one hand it projects beyond the vertical plane (D) into the room part (1 3") and on the other hand over the vertical plane (E) protrudes from the room part (1 3 '").

6. Concrete recycling plant for the reprocessing of residual concrete according to claim 2, characterized in that in the vertical frame plane (D) in the horizontal frame plane (G) a crossmember (20) and offset by 90 ° on this two beams (1 9) and on the vertical frame plane (B) in a central axis (X) to the room part (1 3 ") a pipe support (21) with these supporting sub-beams (1 9 ') are arranged.

7. Concrete recycling system for recycling residual concrete according to claim 1, characterized in that the modular unit (1 1) from at least one flushing boom (1) with electronic vehicle detection, flushing water supply line (V) and hand switch, the feed basin (2) with side walls ( 2 '), end wall (2 "), rear wall (2'"), brackets (2 "") and grating (2 '"") and the conveyor units (5) with concrete pumps (5', 5 ") and flushing water pumps (5 '", 5" ") and various pipes, pipe bends, connecting flanges and pipe clamps is formed, with all operating parts of the delivery units (5), except the flushing water supply line (V) and a pressure pipe (1 5), in the closable part of the room (1 3' ) the frame unit (1 3) are arranged.

8. Concrete recycling plant for the recycling of residual concrete according to claim 1, characterized in that the modular unit (1 2) with the washing device (3), the mixing device (4), the classifying sieve (8) and the scooping devices (6, 7) is mounted and guided in the space part (1 3 ") on the drive (9) in such a way that it works in the separate basin (1 6) enclosed by the frame unit (1 3) rotating about the central axis (X) and within the basin (1 6) a maximum of up to two thirds can be enclosed by the media contained therein.

9. Concrete recycling plant for the recycling of residual concrete according to claim 1, characterized in that the washing device (3) with the classifying sieve (8) and the scooping devices (6, 7) by two drive rings (23), several receiving rings (24), several Guide tubes (25), supports (26), spacer tubes (27), worm blades (28), scoops (29) and support rods (30) are connected.

1 0. Concrete recycling plant for the recycling of residual concrete according to claim 9, characterized in that the drive rings (23) each consist of a radially extending ring surface (23 '), the outer edge of which is formed by a ring band (23') formed at right angles to the ring surface (23 ') 23 "), wherein the ring surface (23 ') has holes (23'") distributed in one and / or in two circular planes at equal intervals over the ring surface (23 ').

1 1. Concrete recycling plant for the reprocessing of residual concrete according to claim 9, characterized in that the receiving rings (24) consist of a radially extending annular surface (24 ') which have holes (24 ") distributed in two circular planes evenly over the annular surface (24') .

1 2. Concrete recycling plant for the recycling of residual concrete according to claim 1 0 and 1 1, characterized in that the bores (23 '") and (24") on the outer circular plane of the ring surfaces (23') and (24 ') on both sides Take up scoop cups (29) and the bores (23 '") and (24") of the ring surfaces (23') and (24 ') of the drive rings (23) and the receiving rings (24) on the inner circular plane on both sides of guide tubes (25).

1 3. Concrete recycling plant for the reprocessing of residual concrete according to claim 9, characterized in that the supports (26) on the end face on the one hand a concave recess (26 ') and on the other hand at an acute angle ( ^* X) to the longitudinal axis (Y) Have supports arranged flange (26 "), are made in two different lengths and that each have two different lengths of support (26) at a defined distance from each other on the one hand with the concave recess (26 ') on one of the guide tubes (25) and on the other one of the support rods (30) are fastened, the shorter supports (26) running parallel to the vertical frame plane (D) and the longer supports (26) running parallel to the vertical frame plane (C).

14. Concrete recycling plant for the recycling of residual concrete according to claim 9, characterized in that each support rod (30) at one end with an obtuse angle (ß) to the longitudinal axis (Z) of the support rod (30) angled over a defined area and with several Bores (30 ') is provided, at least two bores (30') being arranged at the angled end and further bores (30 ') distributed over the entire length of the support rod (30).

1 5. Concrete recycling plant for the recycling of residual concrete according to claim 1 4, characterized in that the angled area of the support rod (30) on an end face (31 ') of an annular flange (31) and the remaining part of the support rod (30) to the Flanges (26 ") of the supports (26) is releasably attached.

1 6. Concrete recycling plant for the recycling of residual concrete according to claim 1 5, characterized in that several on the end face (31 ') of the ring flange (31) over the circumference of the end face (31') arranged and arranged on the flanges (26 " ) the supports (26) attached support rods (30) form a funnel-shaped cavity in which the classifying screen (8) is interchangeably inserted.

1 7. Concrete recycling plant for the reprocessing of residual concrete according to claim 9, characterized in that the screw blades (28) each consist of an annular surface segment which is broken four times against and parallel to a longitudinal axis (W) and in the middle and at both ends in each case has a breakthrough (28 ') and that the screw blades (28) are staggered at defined intervals by means of the breakthroughs (28') on always three guide tubes (25), the defined distances being due to the different lengths between the worm blades (28) the guide tubes (25) arranged spacer tubes (27) are determined.

1 8. Concrete recycling plant for the recycling of residual concrete according to claim 1 7, characterized in that several with screw blades (28), spacer tubes (27), supports (26), support tubes (30) and receiving rings (24) with scooping buckets (29) equipped guide tubes (25) are connected on both sides with a drive ring (23).

1 9. Concrete recycling plant for the recycling of residual concrete according to claim 1, characterized in that the mixing device (4) is a frame (32) consisting of a number of supports (33), supports (34), tensioning tubes (35), bridges (36) and plates (37) and sheets (38) is formed

20. Concrete recycling plant for the recycling of residual concrete according to claim 1 9, characterized in that the frame (32) stabilized by cross-shaped tensioning tubes (35) on one side runs around the tube support (21) of the frame (22) and on the opposite Side has an open cylindrical frame part (32 ') which is fastened with plates (37) to an annular flange (39).

21. Concrete recycling plant for the reprocessing of residual concrete according to claim 7, characterized in that the pressure pipeline (1 5) led in the vertical plane (B) from the room part (1 3 ') of the frame unit (1 3) into the room part (1 3 ") ) on the pipe support (21) of the frame (22), through the ring flange (39) of the mixing device (4) and the ring flange (31) of the washing device (3) and behind the plane of the ring flange (31) in the area of Classifying sieve (8) ends.

22. Concrete recycling plant for recycling residual concrete according to claim 1, characterized in that the separate basin (1 6) has a trough-like shape, from a semicircular floor (1 6 '), two end walls (1 6 ") and two side walls ( 1 6 '") is formed and that in the interior of the basin (1 6) parallel to the end walls (1 6") two partition walls (40) and (41) and parallel to the side walls (1 6'") a channel (42 ) is arranged.

23. Concrete recycling plant for the reprocessing of residual concrete according to claim 22, characterized in that the partition (40) vertically to the semicircular floor (1 6 ') is carried out at a height which corresponds to approximately two thirds of the pool height and between the mixing device ( 4) and the washing device (3) separates the basin (1 6) into the clarifying section (1 0) and the pre-washing and after-washing area of the washing device (3).

24. Concrete recycling plant for the reprocessing of residual concrete according to claim 22, characterized in that the partition (41) is arranged vertically to the semicircular bottom (1 6 ') at a height which corresponds approximately to the depth of the scoop (29) and that it between the two scooping devices (6) and (7) separates the basin (1 6) into the pre-wash and post-wash chamber of the washing device (3).

25. Concrete recycling plant for recycling residual concrete according to claim 22, characterized in that the channel (42) in the lower third and at right angles to the end wall (1 6 ") is arranged in the frame plane (D) of the basin (1 6) and in Completed state of the system crosses the vertical planes of a drive ring (23) and several receiving rings (24) and protrudes into the pool area to such an extent that it receives the coarse components of the residual concrete from the cone of the classifying sieve (8).

26. Concrete recycling plant for recycling residual concrete according to claim 1, characterized in that the drive (9) from a motor (43), a drive shaft (44), two friction wheels (45) on friction wheel shafts (46), brackets (47) is formed with rollers, small sprockets (48) and large sprockets (49), roller chains (50), chain tensioners, chain guards, pressure arms (51) with tuning plates (52) as well as various holders, plates and flanges and in the horizontal frame plane (F) is mounted on the frame (22).

27. Concrete recycling plant for recycling residual concrete according to claim 26, characterized in that on the horizontal frame plane (F) in the region of the vertical frame planes (C) and (D) on the frame (22) each have a friction wheel shaft (46) parallel to the horizontal Frame level (F) is mounted, on each of which at one end a friction wheel (45) and a large sprocket (49) is arranged opposite, the two friction wheels (45) protruding into the space (1 3 ") and the assembled modular unit (1 2) with the inner surface of a ring band (23 ") of the drive rings (23).

28. Concrete recycling plant for the reprocessing of residual concrete according to claim 26, characterized in that the drive shaft (44) is guided parallel to the horizontal plane (F) in the vertical frame plane (C) and (D) in a bearing block, the A small sprocket (48) is arranged at the extended ends of the drive shaft (44) and the small sprockets (48) rotate the motor (43) via the drive shaft (44) through a roller chain (50) onto the large sprockets (49). transmitted, whereby the friction wheel shafts (46) and the friction wheels (45) arranged thereon rotate and transmit the rotary movement via the drive rings (23) to the modular unit (1 2).

29. Concrete recycling plant for the reprocessing of residual concrete according to claim 26, characterized in that on the horizontal frame level (F) in the area of the two vertical frame levels (C) and (D) in the space part (1 3 ") directed two consoles ( 47) are arranged with rollers so that the rollers press against the outer surface of the ring belts (23 ") and the drive rings (23) guide and hold against the friction wheels (45).

30. Concrete recycling plant for the reprocessing of residual concrete according to claim 26, characterized in that on the horizontal frame level (F) in the area of the two vertical frame levels (C) and (D) in the space part (1 3 ") directed two pressure arms ( 51) are arranged with tuning plates (52) so that they press against the ring surfaces (23 ') and guide the two drive rings (23) radially.