JP2008222531A - Aggregate regenerating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aggregate regenerating device that is inexpensive with a simple device configuration and capable of efficiently regenerating an aggregate to recover. <P>SOLUTION: The aggregate regenerating device is equipped with a process tank 2 to which concrete waste flakes are supplied, in which a drive shaft 3 is installed as freely rotatable at the center of the process tank 2 and a cylindrical inner barrel 5 is disposed around the drive shaft 3. A blade body 6 is fixed to the drive shaft 3 through an arm 7, the blade body configured in such a manner that the blade body rotates along the inner wall 2a of the process tank 2 and along the outer wall 5a of the inner barrel 5 and that the gap between the blade and the inner wall 2a of the process tank 2 is gradually narrowed in the backward direction with respect to the rotation direction. The concrete waste flakes are ground in the narrow part 8 formed by the blade body 6 and the inner wall 2a of the process tank 2 to recover the aggregate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an aggregate regeneration processing apparatus that regenerates and collects high-quality aggregate from concrete waste generated in the demolition work or the like of a concrete structure.

  2. Description of the Related Art Conventionally, most of concrete waste materials generated in large quantities due to concrete structure demolition work, etc., are crushed to an appropriate size by a crushing device or the like and then reused as roadbed materials, backfill materials, and the like. However, the actual amount of demand for the roadbed material, backfill material, and the like corresponding to the amount of concrete waste generated that is expected to increase further in the future cannot be expected.

  Therefore, when considering the use as an alternative to the above-mentioned roadbed materials and backfill materials, it is easy to conceive reuse as aggregates for concrete. Even if it is crushed to the level, only a very high water-absorbing aggregate with a large amount of cement and mortar on the surface can be obtained, and it is sufficient to produce concrete using such a low-quality aggregate. In reality, it is difficult to develop concrete strength, and in reality, it is hardly reused as aggregate for concrete.

  On the other hand, some proposals have been made to try to solve the above-mentioned problems. For example, in Patent Document 1 (Japanese Patent No. 3329369), a steel rod that scrapes concrete waste material inside a vertically disposed cylindrical casing. A vertical rubbing apparatus is described which comprises a table feeder for rotating a rubbing medium such as the like and having a table feeder for discharging the aggregate obtained after the rubbing process at the lower part of the casing. In Patent Document 2 (Japanese Patent No. 3718220), two relatively rotating drive shafts are arranged vertically on the same axis, and a cylindrical supply rotor that opens downward is attached to the upper drive shaft. On the other hand, a cylindrical discharge rotor having a slightly larger diameter than the supply rotor is attached to the lower drive shaft, and the supply rotor and the discharge rotor are configured to be close to and away from each other. A polishing apparatus is described in which a gap through which aggregate after polishing treatment can pass is formed between the surface and the inner peripheral surface of the discharge rotor.

Patent Document 3 (Japanese Patent Publication No. 7-29821) discloses a first crushing step for crushing a concrete lump by a compression process such as a jaw crusher, and a primary crushing concrete lump obtained in the first crushing step. A second crushing step of crushing by, for example, a high-density and high-pressure squeezing process using a crusher composed of a fixed upper liner and a lower liner that is rotated and biased upward, A method for reclaiming aggregate from construction waste is described which comprises a step of sieving the reprocessed aggregate mixture obtained in the second crushing step.
Japanese Patent No. 3329369 Japanese Patent No. 3718220 Japanese Patent Publication No. 7-29821

  As described above, various methods and apparatuses for reclaiming and recovering aggregate from concrete waste to a degree that can be reused as concrete aggregate have been proposed. However, the present inventors are simpler and less expensive. It was considered that it would be possible to provide an aggregate regeneration processing apparatus capable of recycling and collecting aggregate more efficiently.

  The present invention has been made in view of the above points, and it is an object of the present invention to provide an aggregate regeneration processing apparatus capable of reducing the cost by simplifying the configuration of the apparatus and efficiently recovering and collecting the aggregate. .

  In order to solve the above-mentioned problems, the aggregate regeneration processing apparatus according to claim 1 according to the present invention includes a substantially bread-shaped processing tank to which a piece of concrete waste material is supplied, and a central portion in the processing tank A drive shaft is provided so as to be rotatable, and a substantially cylindrical inner body portion concentric with the processing tank is provided around the drive shaft, and the inner peripheral wall of the processing tank and the outer peripheral wall of the inner body portion are provided on the drive shaft. The blade body configured so that the interval with the inner peripheral wall of the treatment tank gradually narrows toward the rear with respect to the rotation direction is fixed through the arm, and the blade body and the treatment tank It is characterized in that the aggregated material is recovered by rubbing the scrap of concrete at the constriction formed by the inner peripheral wall.

  The aggregate regeneration processing device according to claim 2 is configured such that the distance between the blade body and the outer peripheral wall of the inner body portion gradually decreases toward the rear in the rotation direction. It is characterized in that the aggregated material is recovered by rubbing and treating the scrap of concrete at the constriction formed by the outer peripheral wall of the material.

  In the aggregate regeneration processing apparatus according to claim 3, the interval between the narrowed portions formed by the blades and the inner peripheral wall of the processing tank and / or the outer peripheral wall of the inner trunk portion can be adjusted. Yes.

  Further, in the aggregate regeneration processing apparatus according to claim 4, a slit having a predetermined width is formed at the bottom of the treatment tank, and cement or mortar powder generated in the rubbing treatment of the waste concrete piece is accompanied with the rotation of the blade body. It is characterized by discharging from the slit.

  Further, in the aggregate regeneration processing apparatus according to claim 5, a substantially disc-shaped plate that rotates together with the drive shaft is fixed to an upper end portion of the drive shaft, and a waste concrete piece is supplied onto the plate, thereby processing the tank. It is characterized by being able to supply in a distributed manner.

  In the aggregate regeneration processing apparatus according to claim 6, a supply hopper for supplying concrete waste pieces is provided above the processing tank, and the discharge port at the lower end portion of the supply hopper faces the upper surface of the plate at a predetermined interval. In addition, the distance between the discharge port and the plate can be adjusted.

  According to the aggregate regeneration processing apparatus of the first aspect of the present invention, it is provided with a substantially pan-shaped processing tank to which a piece of concrete waste is supplied, and a drive shaft is rotatable at the center of the processing tank. The drive shaft is provided with a substantially cylindrical inner barrel concentric with the processing tank, and the drive shaft rotates along the inner peripheral wall of the processing tank and the outer peripheral wall of the inner trunk. In addition, a blade body configured such that the distance from the inner peripheral wall of the processing tank gradually decreases toward the rear with respect to the rotation direction is fixed through an arm, and is formed by the blade body and the inner peripheral wall of the processing tank. The scrap of concrete is scraped and collected in the constricted part to collect the aggregate, so that the device configuration can be made very simple and the cost can be reduced, and the inside of the treatment tank can be reduced. Concrete is discarded at the constriction formed by the rotating blade and the inner peripheral wall of the treatment tank. It can be effectively repeated rubbing crumpling treatment migraine, efficiently and reliably can be recovered by reproducing processing aggregate.

  Further, according to the aggregate regeneration processing device of claim 2 according to the present invention, the blade body is configured such that the distance from the outer peripheral wall of the inner trunk portion gradually decreases toward the rear with respect to the rotation direction, Since the concrete waste material was rubbed and collected in the constricted part formed by the blade body and the outer peripheral wall of the inner body part, the aggregate was collected, so the blade body rotating inside the treatment tank and the inner body part Similarly, in the constricted portion formed by the outer peripheral wall, the concrete waste piece can be rubbed and the aggregate can be regenerated and recovered more efficiently and reliably.

  Moreover, according to the aggregate regeneration processing apparatus of the third aspect of the present invention, it is possible to adjust the interval between the narrowed portions formed by the blades and the inner peripheral wall of the processing tank and / or the outer peripheral wall of the inner trunk portion. Therefore, by adjusting the interval of the narrowed portion appropriately according to the particle size and properties of the concrete waste piece, cement or mortar content remains on the aggregate surface due to insufficient rubbing, or from excessive rubbing The trouble that the aggregate itself is crushed can be prevented, and the optimum rubbing treatment can always be performed.

  Moreover, according to the aggregate regeneration processing apparatus according to claim 4 of the present invention, a slit having a predetermined width is formed at the bottom of the treatment tank, and cement or mortar powder generated by the rubbing treatment of the waste concrete piece is removed. Since it is discharged from the slit as the blades rotate, it is possible to reliably separate and collect the aggregate and the peeled cement and mortar powder with a simple structure, and peel the cement and mortar content. Thereafter, it can be immediately discharged and removed to prevent reattachment to the aggregate.

  According to the aggregate regeneration processing apparatus of the fifth aspect of the present invention, a substantially disk-shaped plate that rotates together with the drive shaft is fixed to the upper end portion of the drive shaft, and the concrete waste piece is placed on the plate. Since it can be distributedly supplied into the processing tank by supplying, the waste concrete pieces can be supplied almost uniformly into the processing tank, and the power load during the rubbing process can be reduced, which is preferable in terms of maintenance.

  According to the aggregate regeneration processing apparatus of the sixth aspect of the present invention, the upper part of the processing tank is provided with a supply hopper for supplying concrete waste pieces, and a discharge port at the lower end of the supply hopper is provided on the upper surface of the plate. Since the gap between the discharge port and the plate can be adjusted, the concrete waste material can be adjusted by appropriately adjusting the distance between the discharge port and the plate according to the particle size, properties, etc. of the concrete waste material. The supply amount of the pieces can be adjusted to an optimum value corresponding to the rubbing treatment capability of the treatment tank, and the optimum rubbing treatment can always be performed.

  The aggregate regeneration processing apparatus of the present invention includes a substantially pan-shaped processing tank to which a piece of concrete waste material is supplied, and a drive shaft is rotatably erected at the center of the processing tank, Around the drive shaft is provided with a substantially cylindrical inner body concentric with the processing tank, and the drive shaft rotates along the inner peripheral wall of the processing tank and the outer peripheral wall of the inner tank, and in the direction of rotation thereof. On the other hand, for example, a substantially boat-shaped blade body configured so that the distance between the inner peripheral wall of the treatment tank and the outer peripheral wall of the inner trunk portion gradually narrows toward the rear is fixed via an arm, and the blade body Cement and mortar are peeled and removed from the surface by sandwiching and scraping concrete waste pieces at each constricted part formed by the side surface of the inner wall and the outer peripheral wall of the treatment tank. The aggregate can be collected in the state of being.

  In addition, a substantially boat-shaped blade body is configured to be slidable with respect to the arm, whereby the interval between each narrow portion formed by the blade body and the inner peripheral wall of the processing tank or the outer peripheral wall of the inner trunk portion is set. Adjustable. Then, by appropriately adjusting the interval between the narrowed portions according to the particle size, properties, etc. of the waste concrete piece, for example, cement or mortar may remain on the aggregate surface due to insufficient rubbing due to the interval being too wide. Alternatively, it is possible to prevent the problem that the aggregate itself is crushed from excessive rubbing due to the interval being too narrow, and to always perform the optimum rubbing treatment.

  In addition, the bottom of the treatment tank has a number of slits that are wide enough to prevent the passage of aggregate-sized ones, and only fine powders such as cement and mortar generated by rubbing the waste concrete pieces are impellers. As the body rotates, it is forcibly discharged from the slit to the outside of the treatment tank so that the aggregate, cement and mortar powder can be reliably separated and recovered. In addition, a substantially disk-like plate that rotates together with the drive shaft is fixed to the upper end portion of the drive shaft, and a supply hopper for supplying concrete waste pieces is provided above the processing tank, and the lower end portion of the supply hopper Discharge port faces the upper surface of the plate at a predetermined interval, and the concrete waste material discharged from the supply hopper is scattered to the surroundings by the centrifugal force of the rotating plate. It is possible to reduce the power load by suppressing the uneven distribution of the waste concrete pieces in the treatment tank.

  Further, the fixing position of the supply hopper can be freely changed in the vertical direction so that the gap interval between the discharge port at the lower end of the supply hopper and the plate can be adjusted, thereby adjusting the supply amount of the waste concrete piece. And by appropriately adjusting the supply amount according to the particle size, properties, etc. of the concrete waste material pieces, for example, so that there is no problem that the power load unexpectedly increases from excessive supply of the concrete waste material pieces, An optimum amount corresponding to the rubbing and treating capacity of the treatment tank is always provided.

  And when scraping the concrete waste material generated at the site of demolition of the concrete structure and collecting the aggregate, first, depending on the particle size and properties of the concrete waste material piece, the fixing position of the blade body to the arm is determined. Slide to adjust the distance between each narrowed part of the blade body and the inner peripheral wall of the processing tank or the outer peripheral wall of the inner barrel so that the optimum rubbing process can be performed and the fixing position of the supply hopper is changed. The interval between the discharge port and the plate is adjusted so that the optimum supply amount according to the rubbing capacity of the treatment tank is obtained. Then, when the concrete scrap piece is put into the supply hopper while rotating the blade at a predetermined speed by rotating the drive shaft, the concrete waste piece discharged from the discharge port at the lower end of the supply hopper is rotated on the plate rotating with the drive shaft. Then, it is gradually dropped into the treatment tank through the gap between the discharge port and the plate by centrifugal force.

  The waste concrete pieces supplied into the treatment tank are appropriately pushed out to the outside and inside of the treatment tank by the rotating substantially boat-shaped blades. Of these, the waste concrete pieces pushed to the outside are While being sandwiched and rubbed by a narrowed part formed by the blade body and the inner peripheral wall of the treatment tank, the concrete waste material pushed inward is formed by the blade body and the outer peripheral wall of the inner body part. In the same manner, it is sandwiched and rubbed. In this way, the concrete waste piece is effectively repeatedly subjected to the rubbing treatment by the rotating blades, and eventually the high-quality aggregate from which the cement and mortar are peeled and removed is regenerated. The cement and mortar powder peeled and removed from the aggregate is discharged from the slit to the outside of the treatment tank as the blades rotate, and is removed without reattaching to the aggregate. Only the processed aggregate remains and is discharged and collected from the processing tank through a separate aggregate discharge gate.

  Thus, the apparatus configuration of the aggregate regeneration processing apparatus can be made very simple and can be reduced in cost, and is also suitable for maintenance, and the rotating blade body, the inner peripheral wall of the processing tank, and the inner trunk part The concrete waste pieces can be effectively and repeatedly rubbed at each narrow portion formed by the outer peripheral wall, and the aggregate can be regenerated and recovered extremely efficiently and reliably. In addition, the interval between the narrowed portions can be adjusted to an optimal interval according to the particle size, properties, etc. of the concrete waste material pieces, so that excessive or insufficient rubbing can be prevented and good rubbing treatment can always be performed.

  Also, the cement and mortar powder generated by the rubbing process can be immediately discharged from the slits drilled in the bottom of the processing tank, and can be reliably separated from the aggregate and recovered, and reattached to the aggregate. Can be prevented. In addition, by supplying concrete waste pieces on a plate that rotates together with the drive shaft, it becomes possible to distribute the waste into the treatment tank substantially evenly, reducing the power load during rubbing treatment, which is suitable for maintenance. is there. Furthermore, since the supply amount of the waste concrete pieces can be adjusted as appropriate, it can be adjusted to an optimum value corresponding to the rubbing capacity of the processing tank, and the optimum rubbing process is always possible.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 denotes an aggregate regeneration processing apparatus that regenerates and collects aggregate from concrete waste pieces, and includes an approximately pan-shaped treatment tank 2 to which the waste concrete pieces are supplied. A drive shaft 3 is rotatably provided at the center of the processing tank 2, and a drive motor 4 for rotating the drive shaft 3 at a predetermined speed is provided below the processing tank 2. The drive shaft 3 is provided with an inner cylindrical portion 5 which is concentric with the treatment tank 2 and is substantially cylindrical. The drive shaft 3 has an inner peripheral wall 2a of the treatment tank 2 and an outer periphery of the inner drum portion 5. Rotating along the wall 5a and configured so that the distance from the inner peripheral wall 2a of the treatment tank 2 and the distance from the outer peripheral wall 5a of the inner trunk part 5 gradually decrease toward the rear with respect to the rotation direction. For example, a plurality of substantially boat-shaped blades 6 are fixed through an arm 7.

  The narrowed portions 8 and 8 'formed by the left and right side surfaces of the substantially boat-shaped blade body 6 and the inner peripheral wall 2a of the processing tank 2 and the outer peripheral wall 5a of the inner trunk part 5 are formed in the processing tank 2. The concrete waste pieces are sandwiched and repeatedly rubbed to remove the aggregate contained by appropriately crushing the concrete waste pieces, and to remove the cement and mortar components adhering to the surface from the aggregate. The high-quality aggregate that can be used for concrete can be recovered by peeling off.

  FIG. 3 is an enlarged perspective view showing a fixing portion between the arm 7 and the blade body 6, and is provided with a locking piece 10 having a long hole 9 formed in the radial direction of the processing tank 2 at the distal end portion of the arm 7. At the same time, the bolts 11 are inserted into the long holes 9 so as to be slidable along the long holes 9, while the rear side surface of the blade body 6 is prevented from biting concrete waste pieces during the rubbing process. For this purpose, for example, a vertical arm 13 is fixed via a cushioning material 12 such as a rubber plate or a leaf spring, and a fixing piece 14 provided at an upper end portion of the vertical arm 13 and a locking piece 10 of the arm 7 are connected. The bolts 11 are fastened and fixed.

  Therefore, by operating the bolt 11 to be loosened, the blade body 6 can be freely slid in the direction of the arrow in FIG. 3, and the blade body 6, the inner peripheral wall 2 a of the treatment tank 2, and the inner trunk portion 5. The interval between the narrowed portions 8 and 8 'formed by the outer peripheral wall 5a can be easily adjusted. Then, by appropriately adjusting the interval between the narrowed portions 8 and 8 'according to the particle size, properties, etc. of the waste concrete piece, for example, the cement surface and the mortar content on the aggregate surface due to insufficient rubbing due to the interval being too wide. To prevent the problem that the aggregate itself is crushed or excessive overload is applied to the drive motor 4 due to excessive residual stagnation due to excessively squeezed due to excessively small intervals. Processing is possible.

  According to the test results conducted by the present inventors, as a guideline for the interval between the narrowed portions 8 and 8 ', for example, the particle size of the waste concrete piece obtained by crushing the concrete structure is 40 mm. In this case, it was found that if the distance between the narrowed portions 8 and 8 'is adjusted to be slightly smaller than that, for example, about 25 to 35 mm, the concrete waste piece can be rubbed well without excess or deficiency.

  Further, in the blade body 6, if the slide adjustment is performed so as to narrow the interval between the one narrowed portions 8, the interval between the other narrowed portions 8 ′ naturally increases, but for example, as shown in FIG. 4. If the tip of the substantially boat-shaped blade body 6 has a hinge 15 structure and a turnbuckle 16 or the like is provided on the inner side of the blade body 6, the turnbuckle 16 is rotated according to the turning operation of the turnbuckle 16. As indicated by the arrows in the figure, the blade thickness of the blade body 6 can be increased or decreased, and the blade body 6 and the inner peripheral wall 2a of the treatment tank 2 and the outer peripheral wall 5a of the inner trunk portion 5 are formed accordingly. It is possible to similarly adjust the interval between the narrowed portions 8 and 8 '. At this time, a slide mechanism as shown in FIG. 3 is not necessary for the fixing portion between the arm 7 and the blade body 6.

  By the way, according to the test results conducted by the present inventors, most of the waste concrete pieces supplied into the treatment tank 2 are on the outer side of the treatment tank 2 due to the centrifugal force generated with the rotation of the blade body 6. It was also found that they were gradually unevenly distributed. Therefore, a substantially boat-shaped blade body 6 as shown in FIG. 3 is adopted, and the distance between the narrowed portion 8 formed by the blade body 6 and the inner peripheral wall 2a of the treatment tank 2 is mainly adjusted. However, there is no particular problem in practical use.

  FIG. 5 shows another embodiment of the blade body configured based on the above test results. The blade is formed by a single curved plate extending from the outer peripheral wall 5a of the inner trunk portion 5 to the inner peripheral wall 2a of the treatment tank 2. The body 6 is formed, and the portion corresponding to the narrowed portion 8 ′ in FIG. 3 that has a relatively small rubbing effect is eliminated, while the narrowed portion 8 formed by the blade body 6 and the inner peripheral wall 2 a of the treatment tank 2. By concentrating the waste concrete pieces while utilizing the centrifugal force of the blade body 6 on the side, the rubbing treatment can be efficiently performed. In this case, a sliding mechanism similar to that shown in FIG. 3 is used for the fixing portion between the arm 7 and the blade body 6 so that the interval between the narrowed portions 8 can be adjusted.

  The bottom of the treatment tank 2 is provided with a number of slits 17 having a width that the aggregate contained in the concrete waste pieces cannot pass through, so that a large amount of cement, mortar, or the like generated in large quantities due to the rubbing treatment of the concrete waste pieces. Powder or the like is forcibly discharged from the slit 17 to the outside of the treatment tank 2 as the blade body 6 rotates, so that the aggregate and cement or mortar powder can be reliably separated and recovered, and once separated from the aggregate. The cement or mortar powder that remains in the treatment tank 2 is prevented from reattaching to the aggregate. If the width of the slit 17 is appropriately adjusted, the particle size of the aggregate to be recovered can be adjusted. 18 is a discharge gate for discharging aggregate, and after the cement and mortar powder are removed after the rubbing process is completed, the handle 19 is operated to make it open as shown by the two-dot chain line in FIG. Similarly to the case of discharging the mortar powder, the blade body 6 is rotated so that it can be easily discharged from the treatment tank 2 in a short time.

  In addition, a substantially disk-shaped plate 20 that rotates together with the drive shaft 3 is fixed to the upper end portion of the drive shaft 3, and a conical body 21 is fixed to the upper surface of the central portion of the plate 20, while The upper portion is provided with a supply hopper 22 having a substantially cylindrical shape slightly smaller in diameter than the plate 20 for supplying concrete waste pieces, and a discharge port 22a at the lower end of the supply hopper 22 is provided with a gap 23 at a predetermined interval from the upper surface of the plate 20. I'm leaving. Then, when the concrete waste material piece is put into the supply hopper 22, the concrete waste material piece gradually discharged from the discharge port 22a at the lower end portion thereof is guided to the peripheral portion of the plate 20 by the conical body 21 on the plate 20, The centrifugal force of the rotating plate 20 is sequentially scattered around the gap 23 between the discharge port 22 a and the plate 20, and is distributed and supplied into the processing tank 2 approximately evenly.

  The supply hopper 22 is slidable in the vertical direction with respect to the treatment tank 2 and is fastened and fixed with bolts 24 at an arbitrary height position. The interval of the gap 23 between the plate 22 and the plate 22 can be adjusted, and the supply amount of the waste concrete piece can be adjusted freely. And, by appropriately adjusting the supply amount according to the particle size, properties, etc. of the concrete waste material pieces, for example, so that there is no problem that the power load increases significantly from excessive supply of the concrete waste material pieces, An optimum amount corresponding to the rubbing and treating capacity of the treatment tank 2 is always supplied.

  In the present embodiment, the shape of the supply hopper 22 is a substantially cylindrical shape having a slightly smaller diameter than the plate 20. However, the present invention is not limited to this, and for example, a large capacity hopper having a considerably larger diameter than the plate 20. And a discharge port at the lower end thereof may be provided on the plate 20 at a predetermined interval. Further, for example, it is possible to supply the plate 20 directly from a transfer device such as hand-feeding or a belt conveyor without providing the supply hopper.

  Further, a plurality of bars 25 such as different diameter reinforcing bars are attached to the side surface portion of the blade body 6, the inner peripheral wall 2a of the treatment tank 2, or the outer peripheral wall 5a surface of the inner trunk portion 5 at arbitrary intervals. Therefore, the flow of the concrete waste material in the treatment tank 2 is inhibited to increase the resistance, and the crushing efficiency of the concrete waste material piece and the separation efficiency of cement and mortar from the aggregate surface are improved. . In addition, it is good to determine suitably the number, the sticking position, etc. of the said bar 25 in view of the flow resistance etc. of the concrete waste material piece at the time of a rubbing process.

  When using the aggregate regeneration processing apparatus 1 configured as described above and scraping the concrete waste generated at the concrete structure demolition site to collect the aggregate, first, the particle size of the concrete waste Depending on the properties and the like, the fixed position of the blade body 6 with respect to the arm 7 is appropriately slid to each narrowed portion 8, 8 ′ between the blade body 6 and the inner peripheral wall 2 a of the treatment tank 2 or the outer peripheral wall 5 a of the inner trunk portion 5. The gap between the hopper discharge port 22a and the upper surface of the plate 20 is changed by appropriately changing the height position of the supply hopper 22 so that the rubbing process can be performed most efficiently and suitably. It adjusts and adjusts beforehand so that it may become the optimal supply amount according to the rubbing processing capability with which the processing tank 2 is equipped.

  Then, the drive shaft 3 is driven to rotate at a predetermined speed by the drive motor 4, and the blade body 6 is rotated along the inner peripheral wall 2 a of the treatment tank 2 and the outer peripheral wall 5 a of the inner trunk portion 5, while the waste concrete piece Is put into the supply hopper 22, the concrete waste pieces gradually discharged from the discharge port 22a at the lower end of the supply hopper 22 falls onto the plate 20 rotating together with the drive shaft 3, and the dropped concrete waste pieces are caused by the rotation. Due to the centrifugal force, it is distributed and supplied substantially uniformly into the treatment tank 2 through the gap 23 between the discharge port 22a and the plate 20.

  The waste concrete pieces supplied into the treatment tank 2 were appropriately pushed into the outer side and the inner side of the treatment tank 2 by the rotating substantially blade-shaped blade body 6, and were pushed to the outer side among them. The waste concrete pieces are sandwiched and rubbed by a narrowed portion 8 formed by the blade body 6 and the inner peripheral wall 2a of the treatment tank 2, while the concrete waste pieces pushed inwardly are separated from the blade body 6. A narrowed portion 8 ′ formed by the outer peripheral wall 5 a of the inner trunk portion 5 is similarly sandwiched and rubbed. In this way, the concrete waste material pieces are effectively repeatedly subjected to the rubbing treatment by the rotating blade body 6, and eventually the high-quality aggregate from which the cement and mortar are separated and removed from the surface is regenerated. The cement or mortar powder peeled and removed from the aggregate is immediately discharged from the slit 17 to the outside of the treatment tank 2 as the blade body 6 rotates, and is reliably removed without reattaching to the aggregate. On the other hand, the aggregate remaining in the processing tank 2 after the regeneration process is processed by the discharge gate 18 as the blade body 6 is rotated in the same manner as the discharge of the cement and mortar powder after the discharge gate 18 is opened. It is discharged out of the tank 2 and collected.

  As described above, according to the present invention, the structure of the aggregate regeneration processing device 1 can be made very simple, and the cost can be reduced. In addition, it is possible to effectively and repeatedly scrape concrete waste pieces repeatedly and repeatedly at the narrowed portions 8 and 8 'formed by the inner peripheral wall 2a of the processing tank 2 and the outer peripheral wall 5a of the inner trunk portion 5. The aggregate can be regenerated and recovered extremely efficiently and reliably. In addition, the interval between the narrowed portions 8 and 8 'can be easily adjusted to an optimum interval each time according to the particle size and properties of the concrete waste pieces, and excessive or insufficient rubbing can be prevented as much as possible. Good rubbing treatment can always be performed.

It is a partially cutaway front view showing an embodiment of an aggregate regeneration processing apparatus according to the present invention. It is a partially cutaway top view of FIG. It is a partially cutaway enlarged perspective view of a blade part. FIG. 4 is a diagram showing another embodiment of FIG. 3. It is a figure which shows another Example of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Aggregate reproduction | regeneration processing apparatus 2 ... Processing tank 2a ... Inner peripheral wall (processing tank) 3 ... Drive shaft 5 ... Inner trunk | drum 5a ... Outer peripheral wall (inner trunk | drum)
6 ... Blade body 7 ... Arm 8, 8 '... Constriction 13 ... Vertical arm 17 ... Slit 18 ... Discharge gate 20 ... Plate 21 ... Conical body 22 ... Supply hopper 22a ... Discharge port (supply hopper)

Claims (6)

  A substantially pan-shaped treatment tank to which waste concrete pieces are supplied is provided, and a drive shaft is rotatably provided at the center of the treatment tank, and a substantially cylindrical concentric with the treatment tank is provided around the drive shaft. And the drive shaft rotates along the inner peripheral wall of the processing tank and the outer peripheral wall of the inner trunk section, and the inner peripheral wall of the processing tank toward the rear in the rotational direction. The blades configured to gradually narrow the gap between the blades are fixed through the arm, and the scraps of concrete are scraped off at the constriction formed by the blades and the inner peripheral wall of the treatment tank to collect the aggregate. An aggregate regeneration processing device characterized in that it is configured to do so.   The distance between the blade body and the outer peripheral wall of the inner body portion gradually narrows toward the rear with respect to the rotation direction, and the concrete waste material is formed at the narrowed portion formed by the blade body and the outer peripheral wall of the inner body portion. 2. The aggregate regeneration processing apparatus according to claim 1, wherein the aggregate is collected by rubbing the pieces.   The aggregate regeneration processing apparatus according to claim 1 or 2, wherein an interval between narrow portions formed by the blades and the inner peripheral wall of the processing tank and / or the outer peripheral wall of the inner trunk portion can be adjusted.   A slit having a predetermined width is formed at the bottom of the treatment tank, and the cement and mortar powder generated by the rubbing treatment of the waste concrete pieces are discharged from the slit as the blades rotate. The aggregate regeneration processing apparatus according to claim 1.   A substantially disk-shaped plate that rotates together with the drive shaft is fixed to an upper end portion of the drive shaft, and a concrete waste piece is supplied onto the plate so that it can be distributedly supplied into the processing tank. The aggregate regeneration processing apparatus according to 1 to 4.   The upper part of the processing tank is provided with a supply hopper for supplying the waste concrete pieces, and the discharge port at the lower end of the supply hopper faces the upper surface of the plate with a predetermined interval, and the interval between the discharge port and the plate can be adjusted. The aggregate regeneration processing apparatus according to claim 5.

Images