DE29723981U1 - Concrete recycling plant for the reprocessing of residual concrete - Google Patents

Description

Jürgen Bozenhardt 04 May 1999

72636 Frickenhausen GM35/99

Concrete recycling plant for the reprocessing of residual concrete from unused fresh concrete residues as well as from residues from 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 as well as from residues that arise during the cleaning of concrete production and transport equipment such as truck mixers, mixing plants and concrete pumps on construction sites, in concrete plants and

Reprocessing plants.

During the production of fresh concrete, an average of 2.5% of the total production quantities are returned to the concrete works or reprocessing plants as residual quantities for reprocessing. The reprocessing of these residual quantities is particularly problematic because the water contained in the residual quantities is highly alkaline and mixed with a high proportion of cement. The discharge of this cement-containing water into the sewage system is prohibited for environmental protection reasons. The result is occupational and

material-intensive and therefore costly

Reprocessing processes and/or irreparable environmental damage.

There are known reprocessing plants in which the solid components are washed out of the remaining concrete with the addition of rinse water and classified in, for example, closed washing drums, trough pre-washers, vibrating screen coarse separators or inclined dewatering screws with and without a classifying screen with a downstream clarification section for the collection of the cement-containing water. In these plants, the cement-containing water in the downstream clarification sections must be moved by agitators so that it does not set. The sludge produced in these processes must be removed from the pits and disposed of as hazardous waste. This is costly and material-intensive and is not environmentally friendly.

Washing devices for concrete reprocessing 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 15 174 C1. Concrete residues are fed from concrete truck mixers with rinsing water into the container of the washing device and are then conveyed to the end of the container by means of a rotor in the form of a conveyor screw and fed to the reprocessing by the bucket elevators. A ring is attached to one end of the conveyor screw, which is mounted on several rollers that are arranged outside the water on the trough walls. The conveyor screw rotates with the ring and does not need a drive shaft, which eliminates sealing problems for shaft bearings in cement-containing water. The conveyor screw is driven by a motor-driven pinion that engages with a toothed web arranged on the circumference of the ring.

This construction is very powerful and requires a

correspondingly powerful drive motor with high power consumption.

There are also washing devices for concrete

Reprocessing plants with a mixing and conveying device arranged in a container in the form of a screw and at least two scooping devices are known from DE 195 03 069 A1, in which the mixing and conveying device and the scooping devices are driven by a common chain drive. The mixing and conveying device has a gear on one end to accommodate a drive chain. The gear is mounted on guide rollers arranged on the container wall. The mixing and conveying device is connected to a scoop wheel via a shaft, on the end of which a second gear is arranged to accommodate a second drive chain and which ends with a second end ring, which is also mounted on a guide roller arranged on the front wall of the container. Guide rollers and drive are arranged essentially outside the residual concrete and are therefore less susceptible to failure. However, the chains absorb considerable amounts of solid and liquid components, which displace the chain links and destroy the drive pinions, causing the

Drive is very susceptible to failure. The central shaft bearing between the screw conveyor and the scooping device also increases the susceptibility of this system to failure.

In the above-mentioned washing devices for concrete

In recycling plants, there is also a risk that excessive amounts of residual concrete and other foreign bodies can get into the container, which can overload the system and cause it to need repairs. This results in high failure rates and significant repair costs. In addition, the cement-containing waste water that is produced must be channeled into separate pits or devices and kept constantly moving using motor-driven mixing devices, as the concrete residue sets in stagnant 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 counter-rotating spirals is arranged, which are adapted to the trough shape of the container at a small distance from the bottom of the container. The mixing spirals are guided and supported in a self-supporting manner via running rings on support rollers that are arranged on the front walls of the container and are driven by a chain drive. The mixing spirals working in the opposite direction to the center of the container prevent deposits on the edges of the container, but the devices require an additional drive unit in addition to the washing devices and thus additional energy and cost expenditure. In addition, the cement-containing water must be filled into and emptied from the separate mixing device, which requires additional transport effort.

In the known washing plants and in the mixing plants, the rotating parts of the plant are carried by several rollers, which are attached to the

This leads to strong friction forces that require powerful drive units. For the different
Process sequences require several drives that operate independently
operated, serviced and monitored by each other. This is
energy, material and costly. In addition, improper operation of the systems cannot be ruled out because they are easily accessible

Overloading of systems and the resulting failure of the units and their repair are the norm.

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

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

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

The design of the feed tank with a grating according to claim 7 prevents the penetration of foreign bodies that could destroy the units and, due to its volume, has a storage capacity that allows the truck mixers to be dispatched at short notice. The electronic vehicle detection automatically triggers the supply of flushing water to the system components and, if necessary, the setting of the drive to full power. The uncontrolled

Pouring too much residual concrete into the feed tank can only lead to the feed tank overflowing, as the electronic level monitoring in the mixing and washing system only allows residual concrete to be added in quantities that the system can process. This means that the washing and mixing system, as well as the drive and conveyor units, cannot be overloaded.

The driver can manually activate the supply of flushing water to the truck mixer drum using a hand switch on the flushing boom.

The combined design 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 are to be emphasized. This is particularly due to the structural design of the washing device according to claims 9 to 18, in which the washing device with the classifying screen and the scooping devices is connected via a system of
Drive and receiving rings as well as support tubes are connected to one another in such a way that central storage of the functional elements and their continuous operation within the residual concrete is unnecessary. The arrangement of the classifying screen in the inventive system of supports and support rods according to claims 13 to 16 also enables the classifying screen to be exchanged at short notice and the classification or return to reprocessing according to the desired different grain sizes of the solid components of the residual concrete. The direct coupling of a lightweight frame construction 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 in rotating motion at the same interval as the washing device via a single drive, which eliminates the need for the previously separate mixing process in pits. The basin according to claims 22 to 25, which is enclosed separately from the frame unit, divides the plant by two partition walls into a purification section, in which the cement-containing water is moved until it is returned to the production process and pumped out if necessary, and into a pre-wash and post-wash chamber, in which the solid components of the residual concrete are

Screw blades are used to transport the material to the classifying screen, where it is separated into coarse and fine grain fractions via a channel in the basin and transported with two scooping devices to a divided drainage channel for further 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 the media to be processed not only ensures considerable energy and cost savings, it also ensures that the drive parts are not adversely affected or destroyed by the aggressive cement water. The mounting of the washing and mixing device on just one friction wheel on both sides ensures that the structure is easy to move, which also eliminates the need for the 5 powerful motors that were previously required.

The automatically controlled sequence of process steps in the integrated recycling system according to the invention using conventional electronic control elements allows a process sequence that is largely independent of subjective factors and saves operating personnel for the previously required separate process sequences in reprocessing. It enables the saving of work equipment, transport routes and time required for transport between the previously separately installed and manually operated processing systems. The expensive additional construction costs for the construction of the septic tanks and the energy and personnel costs for operating and maintaining the tanks are eliminated. Additional screening and separation systems are no longer required. The simultaneous cleaning of the pumps, pipe systems, mixing and washing system parts as well as the feed and work basin, which takes place automatically with the reprocessing process and independently of subjective influencing factors, also guarantees a significantly longer service life for all machine and system parts, control elements and transport means as well as a high time saving for the cleaning that was previously carried out manually. The destruction of plant and machine parts due to improper operation such as overfilling of the feed tanks and

Overloading of the systems is prevented by electronic control and monitoring as well as the optimal dimensioning of the system components.

Finally, a significant advantage of the electronically controlled and monitored reprocessing plant is that its use is guaranteed to be independent of the concrete plant and the approaching truck mixer drivers in terms of time and space.

The invention is described in more detail below using an embodiment. The drawings show

Fig. 1 shows the front view of a concrete recycling plant according to the invention without frame walls and basins,
15

Fig. 2 the top view of a concrete recycling according to the invention

system without frame walls and basins,

Fig. 3 shows the side views of a concrete recycling system according to the invention.

system in section A-A and in section B-B from Fig. 1,

Fig. 4 the front view of the frame unit of a

inventive concrete recycling plant without frame walls,
25

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

Concrete recycling plant without frame walls,

Fig. 6 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,

Fig. 7 the top view of the complete

mounted washing device,

Fig. 8 the side view of the washing device in section B-B

from Fig.1,

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

Fig.10,

Fig. 10 the front view of a drive ring,

Fig. 11 the side view of a receiving ring in section C-C from

Fig. 12,

Fig. 12 the front view of a receiving ring,

Fig. 13 the front view of a support,

Fig. 14 the side view of a support,

Fig. 15 the top view of a column flange in section A-A from

Fig. 13,
20

Fig. 16 the front view of a support rod,

Fig. 17 the top view of a support rod,

Fig. 18 the front view of a screw blade,

Fig. 19 the top view of a screw blade,

Fig. 20 the front view of the mixing device in section C-C from

Fig.2,

Fig. 21 the side view of the mixing device in section B-B from

Fig.1 ,

Fig. 22 the side view of the mixing device in section D-D from

Fig.1,

Fig. 23 the front view of the pelvis in section E-E from Fig.2,

Fig. 24 the side view of the basin,

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

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

Fig.2,

Fig. 27 the side view of the drive in section B-B from

Fig.1,

where identical parts are marked with identical numbers.

In Fig.1 and 2, the front view and the top view of a concrete recycling plant in a linear arrangement of the modular units 11 and 12 according to the invention, the drive 9 and a basin 16 as well as a divided drainage channel 17 in and on the modular frame unit 13 can be seen. The basin 16 and the wall surfaces that can be arranged as required on the spatial parts 13' and 13" of the frame unit 13 were not shown in more detail for reasons of visual clarity for the viewer. The frame 22, which is made of conventional steel profiles, is mounted on a base frame 18 as shown in Fig. 4 and 5. The modular units 11 and 12 are arranged in the spatial parts 13', 13" and 13'" of the frame unit 13, which can be easily separated from one another or connected to one another as required by the user. In the linear arrangement form preferably shown, the feed basin 2, made of sheet steel, for example, is arranged as a component of the modular unit 11 with its rear wall 2'" on preferably two brackets 2"" on the front side of the spatial part 13' of the frame unit 13, which is delimited by horizontal frame planes F and I and by vertical frame planes A and B. At right angles to the rear wall 2'", the feed basin 2 is closed on both sides with two side walls 2' that essentially form an acute-angled triangle and a front wall 2" that ends with the diagonals of the side walls 2'. The front wall 2" forms the

Floor of the feed basin 2 and also serves as a kind of slide. In the floor area of the feed basin 2, a suction nozzle to a concrete pump 5" is arranged in the rear wall 2'" and above the suction nozzle parallel to the filling level of the feed basin 2, a grating 2'"" is arranged, through which the penetration of objects that could destroy the conveyor units can be avoided. Above the feed basin 2, a pipe with openings directed into the feed basin 2 is arranged, through which flushing water is supplied to dilute the remaining concrete in the feed basin 2. The pipe is led out of the closed side wall of the room part 13', which is not shown in detail in the drawings. Preferably, a flushing water pipe 1' is arranged vertically from the top wall of the room section 13' (also not shown in detail), which is angled away from the room section 13' at an arbitrarily definable height and forms a flushing boom 1. If required, two flushing booms 1 can also be provided at this point. Flushing water is taken from the flushing water pipe 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 13' of the frame unit 13, which is closed off with walls not shown in detail in the drawings, for example, a concrete pump 5" with an output of 11 kW, a concrete pump 5' of type 3808-381 2/H with an output of 7.5 kW, a flushing water pump 5"" of type 3808-3825/SL with an output of 5.5 kW and a second flushing water pump 5'" of type 3808-3825/SL with an output of 5.5 kW are connected to conventional pipes, pipe sockets, flanges, pipe bends, etc. in such a way that the concrete pump 5" takes the diluted residual concrete from the feed basin 2 and transports it via a pressure pipe 15 into the room part 13" of the frame unit 13. The concrete pump 5' is connected in such a way that it ensures that the cement-containing water draining from the residual concrete is returned to the production process, the concrete pump 5" conveys the diluted residual concrete from the feed basin 2 to the room section 13" for washing out and classification into its coarse and fine components, the rinse water pump 5'" supplies the rinse gallows 1 with rinse water and the rinse water pump 5"" transports rinse water to the feed basin 2. The great advantage of the conveyor units 5 arranged in the room section 13'

consists in the ability to close off the room section 13' by attaching wall elements. In this way, access to the conveyor units 5 is only guaranteed by competent personnel. The arbitrary changing of the set performance parameters on the conveyor units 5 by incompetent persons is not possible, which means that the overloading of pump motors, drive or other system components can be ruled out. In the linear arrangement of the concrete recycling plant according to the invention, the room section 13" delimited by the horizontal frame planes F and I and the vertical frame planes B and D adjoins the room section 13'. The supports 19, crossbeams 20 and pipe supports 21 of the frame 22 fastened to the base frame 18 are arranged in such a way that the room section 13" is detachably connected to the room section 13'. The frame elements are connected to one another in such a way that the spatial part 13" 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 19' to the spatial part 13" is arranged, on which a pressure pipe 15 leading from the spatial part 13' and coupled to the concrete pump 5" is held or carried. In the exemplary embodiment, the length and width of the room part 13" are designed in such a way that they can accommodate the modular unit 12 in its complete version and a separate basin 16 of approximately the same length. Due to the variability of the construction of the frame unit 13, the user can also obtain a system variant that is 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 drained from the washing device directly into such a pit. The basin 16 according to Figs. 23 and 24, not shown in detail in Figs. 1 and 2, consists of a semicircular base 16' that runs along its entire length, to the two opposite upper edges of which two side walls 16'" that run vertically and parallel to one another are connected. Two end walls 16" provided with rectangular recesses close off the basin 16 in the vertical frame planes B and D. In the interior of the basin 16, a partition wall 40 is arranged parallel to the end walls 16" in the frame plane B, a partition wall 41 in the frame plane D and a channel 42 is arranged at right angles to the end wall 16" in the frame plane D. The partition wall 40 divides the basin 16 into

at a height that corresponds to about two thirds of the total height of the basin into a clarification part 10 and a pre-wash and post-wash area of the washing device 3. The partition wall 41 divides the pre-wash and post-wash areas in the basin 16. The channel 42, which is arranged at right angles to the front wall 16" in the frame plane D, projects into the interior of the basin 16. The basin 16 is firmly mounted with the base 16' on the base frame 18 of the frame 22. A conventional emergency drain valve is provided at a suitable point on the base 16'. The particular advantage of the design of the basin 16 according to the invention is the combination of a clarification part 10 and a pre-wash and post-wash area in a self-contained work space, which ensures the combination of the work processes previously carried out in separate systems, washing, classifying and mixing the cement-containing water in pits, in one system. In the selected embodiment, the modular unit 12 is formed from a washing device 3 shown in more detail in Figs. 7 and 8, a mixing device 4 shown in more detail in Figs. 20, 21 and 22, a classifying screen 8 not shown in more detail and preferably two scooping devices 6 and 7. The selected design according to the invention of the two system 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, assembly of the parts outside the frame unit 13. In this case, two drive rings 23, for example made of sheet steel, and preferably three receiving rings 24 arranged parallel to the drive rings 23, according to Figs. 9 to 12, are connected to one another by, for example, eight guide tubes 25 made of untempered steel tubes distributed over the inner circumference of the radially extending ring surfaces 23' of the drive rings 23 and the ring surfaces 24' of the receiving rings 24. Between a drive ring 23 and a receiving ring 24 and between the two further receiving rings 24, scoop cups 29 are mounted over the outer circumference of the ring surfaces 23' and 24', which form the two scoop devices 6 and 7 of the washing device 3. On the guide tubes 25, parallel to the ring surface 24' of the third receiving ring 24 and the ring surface 23' of the second drive ring 23, there are steel sheet rings made of four times

angled, circular segments formed by screw blades 28 are pushed on in an offset manner as shown in Fig. 18 and 19. A screw blade 28 is seated 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 screw blades 28 are ensured by spacer tubes 27 which are also placed on the guide tubes 25. When completed, the assembled screw blades 28 form an interrupted transport screw distributed over the outer circumference of the ring surfaces 23' and 24' according to Fig. 7 between the third receiving ring 23 and the second drive ring 24. In the same area, between the screw blades 28, preferably on each guide tube 25, at least two supports 26 of different lengths, for example made of a square profile, are arranged in the radial direction according to Fig. 13 to 15, on the free end of which a flange 26" is located at an acute angle to their longitudinal axis Y. The shorter supports 26 are arranged parallel to the ring surface 24' of the third receiving ring 24 and the longer supports 26 are arranged parallel to the ring surface 23' of the second drive ring 23. Support rods 30 are attached to the flanges 26" of the supports 26 according to Fig. 16 and 17 mounted. The support rods 30, which are made of non-tempered steel pipes, for example, are angled over a definable area at an obtuse angle to their longitudinal axis Z and have holes 30' distributed over the entire length, with which they are connected by means of conventional connecting means to the flanges 26" of the supports 26 and to their angled area on the outer surface 31' of an annular flange 31 in such a way that they form a truncated cone-shaped cavity. Individual elements made of sheet steel are mounted on the outer surfaces of the truncated cone-shaped cavity, which, when completed, form a classifying screen 8 (not shown in detail in the drawings) that can be equipped with passages of different sizes, whereby classifications according to grain sizes as required can be easily carried out. The washing device 3 according to the invention has the great advantage that all system components are not centrally mounted, which means that the considerable wear of the system components caused by the previous central mountings is avoided. is avoided and frequent repair work is eliminated and maintenance work

·

fts ·

14 -

minimized. The frame 32 of the mixing device 4, which is made of supports 33, supports 34, tension tubes 35, bridges 36 as well as plates 37 and sheets 38 according to Fig. 20 to 22 and is made, for example, from steel profile parts, forms an isosceles quadrilateral in its outer contours, which is brought together at one end to form a protruding cylindrical frame part 32' and is fastened to a ring 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 lightweight construction. Due to the mechanical coupling with the washing device 3 according to the invention, both units can be operated simultaneously using a single drive 9, which results in considerable cost savings when purchasing the drive units and, above all, in saving maintenance personnel. The drive 9 according to the invention is shown in more detail in Figs. 25 to 27, with the arrangement of its components being particularly highlighted. All components of the drive 9 according to the invention, which is made from commercially available individual parts or products, are arranged on the cross members 20 of the vertical frame planes C and D in the horizontal frame plane F of the frame unit 13 outside the residual concrete to be processed in the basin 16. The drive 9 only requires two friction wheels 45, on which the washing device 3 according to Fig. 26 is mounted on both sides with the insides of the ring bands 23" of the drive rings 23.

This design significantly minimizes the friction that was previously caused by the use of up to six friction wheels 45. The minimized friction makes it possible to use a drive motor 43 with a much 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. A further advantage is that the friction wheels 45, like all other drive components, are mounted on the frame 22. Compared to the known arrangement of the friction wheels 45 on the inside of the two end walls 16" of the basin 16, the

The drive 9 according to the invention has a significantly higher stability, since the load of the washing device 3 is held vertically on the angle profile of the frame 22, whereby the front walls 16" of the basin 16 are relieved and maintenance work on the system is easier to carry out.

After the frame unit 13 is completed in the spatial part 13' with the modular unit 11 and in the spatial part 13" with the basin 16 of the modular unit 12 and the drive 9, a conveying means for the coarse and fine grain components to be transported out of the system can be arranged via a spatial part 13'" of the frame unit 13. In the exemplary embodiment, a divided drainage channel 17 is provided for this purpose, which receives the coarse and fine components of the residual concrete transported by the two scooping devices 6 and 7 from the basin bottom 16' of the pre- and post-washing area of the basin 16, from where they can be fed for further use. The divided drainage channel 17 is arranged such that it intersects the vertical planes of the drive ring 23 in the vertical frame plane D and the two receiving rings 24 and projects into the spatial part 13" to such an extent that it is flush with the vertical plane of the third receiving ring 24.

Instead of the drainage channel 17, a conventional conveying means 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 tank 2 and empties the residual concrete in the vehicle drum into the feed tank 2. A vehicle detection system arranged at a suitable location triggers the automatic dilution of the residual concrete with rinse water, its transport to the washing device and, if necessary, the switching on of the drive 9 to full power. Rinse water from the clarification section 10 of the tank 16 is pumped into the feed tank 2 by means of the rinse water pump 5'" and the residual concrete diluted in this way is transported in portions by means of the concrete pump 5" from the feed tank 2 via the pressure line 15 into the pre- and post-washing area of the tank 16 to the washing device 3. Due to the rotating movement of the washing device 3, the coarse grain particles fall from the sieve cone 8 onto the channel 42 in the basin 1 6 into the post-washing area behind the partition wall 41, from where they are

The fine grain components of the remaining concrete fall to the bottom in the pre-washing area of the basin 16, from where they are transported to the second part of the split drainage channel 17 by means of the scooping device 7. The cement-containing water remains in the pre-washing area of the basin 16 up to the height of the partition wall 40. If the water level continues to rise, the cement-containing water flows over the partition wall 40 into the clarification part 10 of the basin 16, where it is constantly kept in motion by the rotating movement of the mixing device 4. From there, the cement-containing water can be returned to the production process using the concrete pump 5', or it can be transported to the feed tank 2 using the flushing water pump 5"" via the flushing boom 1 for cleaning the vehicle drum or for diluting the remaining concrete using the flushing water pump 5'". The portioned discharge of diluted remaining concrete from the feed tank 2 is controlled by an electronically controlled level indicator in the tank 16. In this way, the system cannot be overfilled and the drive 9 cannot be overloaded. When the truck mixer is emptied, it releases the contact for vehicle detection when it drives away from the feed tank 2, 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 after a delay. When the concrete pump 5" is switched off, the drive switches the divided drainage channel 17 is delayed and the drive 9 switches to interval operation, whereby the cement-containing water is kept in even suspension. The electronic level monitoring in the basin 16 is designed so that it can be detected and regulated in the concrete plant. If the defined minimum level in the basin 16 is not reached, this is regulated by a conventional and therefore not described in more detail automatic fresh water refill. 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 through incorrect operation. Due to the modular structure, the plant can be adapted to the needs of the customer at any time.

17 -

Adaptable to customer-specific conditions and wishes. The automatic switching of the drive 9 between interval operation or full power also ensures high energy savings.

- 18 List of reference symbols used

1 Rinsing rack, r Flushing water supply, 2 Feed basin, 2' Side wall of the feed tank, 2" Front wall of the feed tank, 2'" Rear wall of the feed tank, ^ 1 1 T I Consoles, 2"" ¹ grating, 3 washing device, 4 Mixing device, 5 Conveying units, 5' Concrete pump, 5" Concrete pump, 5'" Flushing water pump, 5"" Flushing water pump, 6 scooping device, 7 scooping device, 8th Classifying sieve, 9 Drive, 10 Clarification part, 1 1 modular unit, 12 modular unit, 13 frame unit, 13' Room part of the frame unit, 13" Room part of the frame unit, 13" Room part of the frame unit, 15 pressure pipeline, 16 Pool, 16' Pelvic floor, 16" Front wall of the basin, 16" ' Side walls of the pool, 17 drainage channel, 18 Base of the frame unit, 19 Carrier,

19

19' subcarrier, 20 Traverse, 21 pipe support, 22 Frame, 23 drive ring, 23' Ring surface of the drive ring, 23" ring band, 23'" Holes in the drive ring, 24 mounting ring, 24' Ring surface of the receiving ring, 24" Holes in the mounting ring, 25 guide tube, 26 Support, 26' concave recess of the supports, 26" Flange on the supports, 27 Spacer tubes, 28 auger shovel, 28' breakthroughs in the screw blades, 29 ladle, 30 support bar, 30' Holes in the support rod, 31 ring flange, 31' Front face of the ring flange, 32 Frame of the mixing device, 32' Cylinder on the frame, 33 Carrier, 34 Support, 35 tension tube, 36 Bridge, 37 Plate, 38 Sheet, 39 ring flange, 40 Partition in the pool, 41 Partition in the pool, 42 Channel in the pool,

- 20

43 Engine, 44 Drive shaft, 45 friction wheel, 46 Friction wheel shaft, 47 Console, 48 small sprocket, 49 large sprocket, 50 roller chain, 51 Low pressure, 52 Tuning plate A vertical plane of the frame unit, B M Il Il Il
/ C Il Il TI IT
/ D M M 11 M

The TI

F horizontal plane of the frame unit,

G ,

The TI

X Center axis of the frame unit,

Y longitudinal axis of a column,

Z Longitudinal axis of a support rod,

W Longitudinal axis of a screw blade.

Claims (30)

Jürgen Bozenhardt 04 May 1999 72636 Frickenhausen GM35/99 Protection claims 1. Concrete recycling plant for the reprocessing of residual concrete from unused fresh concrete residues and from residues from the cleaning of concrete production and transport equipment, consisting of a rinsing gallows (1), a feed tank (2), a washing device (3) with mixing device (4) and conveyor units (5), scooping devices (6, 7), classifying screen (8), a drive (9) and a clarification section (10) , characterized in that the rinsing gallows (1), the feed tank (2) and the conveyor units (5) form 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, whereby the modular unit (12) is completely supported and guided on the drive (9) and within a (13) enclosed, divided into a clarification section (10) and a pre-wash and post-wash area, separate basin (16), that through an integrated arrangement of conventional electronic control elements the entire system is fully automatically controlled and monitored, 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 reprocessing residual concrete according to Claim 1, characterized in that the frame unit (13) is formed from the spatial parts (13'), (13") and (13'") from a subframe (18) and a frame (22) arranged thereon and consisting of supports (19), crossbeams (20) and tubular supports (21) and that the frame (22) is subdivided by vertical frame planes (A, B, C, D, E) and horizontal frame planes (F, G, H, I). 3. Concrete recycling plant for the reprocessing of residual concrete according to claim 2, characterized in that the spatial part (13 ¹ ) of the frame unit (13) is limited by the vertical frame planes (A) and (B) and the horizontal frame planes (F) and (I) and is closed on all sides by wall surfaces and that the wall surfaces of the spatial part (13 ') for receiving and fastening the modular unit (11) are provided with openings for the passage and fastening of various pipes, pipe bends, connecting flanges, flaps, pipe clamps and brackets (2"") as well as a lockable door. 4. Concrete recycling plant for reprocessing residual concrete according to claim 2, characterized in that the spatial part (13") of the frame unit (13) is delimited by the vertical frame planes (B) and (D) and the horizontal frame planes (F) and (I), the drive (9) is fastened to the frame (22) in the region of the horizontal frame plane (F), that the modular unit (12) is mounted and guided on the drive (9) between the vertical frame planes (C) and (D) and extends into the separate basin (16) fastened to the base frame (18), and that the spatial part (13") is separably connected to the spatial part (13') in the vertical frame plane (B) and separable in the vertical frame plane (C). 5. Concrete recycling plant for reprocessing residual concrete according to claim 2, characterized in that the spatial part (13'") of the frame unit (13) is delimited by the vertical frame planes (D) and (E) and the horizontal frame planes (F) and (G) and that a divided drainage channel (17) is arranged in the spatial part (13'") in such a way that on the one hand it projects beyond the vertical plane (D) into the spatial part (13") and on the other hand it projects beyond the vertical plane (E) out of the spatial part (13'"). 3 - 6. Concrete recycling plant for reprocessing residual concrete according to claim 2, characterized in that in the vertical frame plane (D) in the horizontal frame plane (G) a cross member (20) and on this two supports (19) offset by 90° and on the vertical frame plane (B) in a central axis (X) to the spatial part (13") a pipe support (21) with supporting sub-supports (19') are arranged. 7. Concrete recycling plant for reprocessing residual concrete according to claim 1, characterized in that the modular unit (11) is formed from at least one flushing boom (1) with electronic vehicle detection, flushing water supply line (T) and manual switch, the feed basin (2) with side walls ( ²¹ ), front 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"") as well as various pipes, pipe bends, connecting flanges and pipe clamps, whereby all operating parts of the conveyor units (5), except for the flushing water supply line (T) and a pressure pipe (15), are arranged in the lockable space part (13') of the frame unit (13). 8. Concrete recycling plant for the reprocessing of residual concrete according to claim 1, characterized in that the modular unit (12) with the washing device (3), the mixing device (4), the classifying screen (8) and the scooping devices (6,7) is mounted and guided in the space part (13") on the drive (9) in such a way that it can be moved in the direction of the frame unit (13) enclosed separate basin (16) rotates around the central axis (X) and can be enclosed within the basin (16) by a maximum of two thirds of the media contained therein. 9. Concrete recycling plant for the reprocessing of residual concrete according to claim 1, characterized in that the washing device (3) with the classifying screen (8) and the scooping devices (6, 7) is connected by two drive rings (23), several receiving rings (24), several guide pipes
(25), supports (26), spacer tubes (27), screw blades (28), scoop buckets (29) and support rods (30). 10. Concrete recycling plant for reprocessing residual concrete according to claim 9, characterized in that the drive rings (23) each consist of a radially extending annular surface (23'), the outer edge of which has an annular band (23") formed at right angles to the annular surface (23'), the annular surface (23') having bores (23'") distributed in one and/or two circular planes at equal intervals over the annular surface (23'). 11. 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 has holes (24") evenly distributed over the annular surface (24') in two circular planes. 12. Concrete recycling plant for reprocessing residual concrete according to claim 10 and 11, characterized in that the bores (23'") and (24") on the outer circular plane of the ring surfaces (23') and (24') receive scoop cups (29) on both sides 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 receive guide tubes (25) on both sides. 13. Concrete recycling plant for reprocessing residual concrete according to claim 9, characterized in that the supports (26) have on the front side on the one hand a concave recess (26') and on the other hand a flange (26") arranged at an acute angle ( ) to the longitudinal axis (Y) of the supports, are designed in two different lengths and that two supports (26) of different lengths are fastened at a defined distance from one another on the one hand with the concave recess (26') to one of the guide tubes (25) and on the other hand to one of the support rods (30), 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). - 5 14. Concrete recycling plant for reprocessing residual concrete according to claim 9, characterized in that each support rod (30) is angled at one end at an obtuse angle ( ) to the longitudinal axis (Z) of the support rod (30) over a defined area and is provided with several bores (30'), with at least two bores (30') at the angled end and further bores (30') distributed over the entire length of the support rod (30). 15. Concrete recycling plant for reprocessing residual concrete according to claim 14, characterized in that the angled region of the support rod (30) is detachably attached to an end face (31') of an annular flange (31) and the remaining part of the support rod (30) is detachably attached to the flanges (26") of the supports (26). 16. Concrete recycling plant for the reprocessing of residual concrete according to claim 15, characterized in that a plurality of support rods (30) arranged on the end face (31') of the annular flange (31) distributed over the circumference of the end face (31') and fastened to the flanges (26") of the supports (26) form a funnel-shaped cavity into which the classifying screen (8) is replaceably inserted. 17. Concrete recycling plant for reprocessing 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 counter to and parallel to a longitudinal axis (W) and has an opening (28') in the middle and at each of the two ends, and that the screw blades (28) are mounted offset at defined intervals by means of the openings (28') on three guide tubes (25), the defined intervals being determined by spacer tubes (27) of different lengths arranged between the screw blades (28) on the guide tubes (25). - 6 18. Concrete recycling plant for the reprocessing of residual concrete according to claim 17, characterized in that a plurality of guide tubes (25) equipped with screw blades (28), spacer tubes (27), supports (26), support tubes (30) and receiving rings (24) with scoop cups (29) are connected to one another on both sides by a drive ring (23). 19. Concrete recycling plant for the reprocessing of residual concrete according to claim 1, characterized in that the mixing device (4) is a frame (32) which is formed from a number of supports (33), supports (34), tensioning tubes (35), bridges (36) as well as plates (37) and sheets (38) 20. Concrete recycling plant for the reprocessing of residual concrete according to claim 19, characterized in that the cross-shaped arranged tensioning tubes (35) stabilized frame structure (32) runs on one side around the tube support (21) of the frame (22) and on the opposite side has an open cylindrical frame part (32') which is fastened to an annular flange (39) by plates (37).
20 21. Concrete recycling plant for the reprocessing of residual concrete according to claim 7, characterized in that the in the vertical plane (B) from the spatial part (13') of the frame unit (13) into the spatial part (13")
guided pressure pipe (15) is held on the pipe support (21) of the frame (22), is guided through the ring flange (39) of the mixing device (4) and the ring flange (31) of the washing device (3) and ends behind the plane of the ring flange (31) in the region of the classifying screen (8). 22. Concrete recycling plant for the reprocessing of residual concrete according to claim 1, characterized in that the separate basin (16) has a trough-like shape, consisting of a semicircular bottom (16'), two
front walls (16") and two side walls (16'") and that in the interior of the basin (16) two partition walls (40) and (41) are arranged parallel to the front walls (16") and a channel (42) is arranged parallel to the side walls (16'"). 23. Concrete recycling plant for reprocessing residual concrete according to claim 22, characterized in that the partition wall (40) is designed vertically to the semicircular bottom (16') at a height which corresponds to approximately two thirds of the basin height and, between the mixing device (4) and the washing device (3), divides the basin (16) into the clarifying part (10) and the pre-wash and post-wash areas of the washing device (3). 24. Concrete recycling plant for reprocessing residual concrete according to claim 22, characterized in that the partition wall (41) is arranged vertically to the semicircular base (16') at a height which corresponds approximately to the depth of the scoop cups (29) and that it divides the basin (16) between the two scoop devices (6) and (7) into the pre-washing and post-washing chambers of the washing device (3).
15 25. Concrete recycling plant for reprocessing residual concrete according to claim 22, characterized in that the channel (42) is arranged in the lower third and at right angles to the front wall (16") in the frame plane (D) of the basin (16) and, in the completed state of the plant, crosses the vertical planes of a drive ring (23) and several receiving rings (24) and projects far enough into the basin space that it receives the coarse components of the residual concrete from the cone of the classifying screen (8). 26. Concrete recycling plant for reprocessing residual concrete according to claim 1, characterized in that the drive (9) is formed from a motor (43), a drive shaft (44), two friction wheels (45) on friction wheel shafts (46), brackets (47) with rollers, small chain wheels (48) and large chain wheels (49), roller chains (50), chain tensioners, chain guards, pressure arms (51) with adjusting plates (52) and various holders, plates and flanges and is mounted on the frame (22) in the horizontal frame plane (F). 8th - 27. Concrete recycling plant for reprocessing 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) a friction wheel shaft (46) is mounted parallel to the horizontal frame plane (F), on each of which a friction wheel (45) is arranged at one end and a large chain wheel (49) is arranged opposite, the two friction wheels (45) projecting into the spatial part (13") and receiving the assembled modular unit (12) with the inner surface of a ring band (23") of the drive rings (23). 28. Concrete recycling plant for reprocessing 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 each, with a small chain wheel (48) being arranged at each of the extended ends of the drive shaft (44) and the small chain wheels (48) transmitting the rotary movement of the motor (43) via the drive shaft (44) through a roller chain (50) to the large chain wheels (49), whereby the friction wheel shafts (46) and the friction wheels (45) arranged on them rotate and transmit the rotary movement via the drive rings (23) to the modular unit (12). 29. Concrete recycling plant for the reprocessing of residual concrete according to claim 26, characterized in that on the horizontal frame plane (F) in the region of the two vertical frame planes (C) and (D) directed into the space part (13"), two brackets (47) with rollers are arranged in such a way that the rollers press against the outer surface of the ring bands (23") and guide and hold the drive rings (23) 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 plane (F) in the region of the two vertical frame planes
(C) and (D) directed into the space part (13"), two pressure arms (51) with adjusting plates (52) are arranged so that they are against the ring surfaces (23') and guide the two drive rings (23) radially.