JP3082648U - Granulation type and quality improvement device for waste concrete recycled aggregate - Google Patents

Abstract

(57) [abstract] (with revision) [PROBLEMS] To dramatically improve the grain shape formed sharply after crushing waste concrete in the production process of recycled aggregate,
Provided is an apparatus for effectively removing cement and mortar adhered to the surface of an aggregate, lowering the ratio of soft stones, and further improving the quality of recycled aggregate. A cylindrical main body having a space therein, rotating rolls for rotatably supporting the cylindrical main body at an installation location thereof, and an external drive source for rotating the cylindrical main body are provided. The cylindrical main body is provided with a waste concrete lump input section 80 on one side and a waste concrete recycled aggregate discharge section 90 on the other side. The room was partitioned, a passage 68 was formed at the center thereof, and the cylindrical main body was arranged in an inclined manner so that the input portion side was higher than the discharge portion side.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an apparatus for improving the grain type and quality of recycled aggregate of waste concrete. The present invention relates to a device that improves the grain type and quality of intermediate aggregate obtained after crushing waste concrete in order to produce aggregate that conforms to the standards.

[0002]

[Prior art]

 Recently, more than about 20 million tons of construction waste is generated in Japan every year, of which about 5 million tons of waste concrete lump and about 2.5 million tons of asphalt waste concrete soul. Large quantities are expected to occur. However, only a very small amount of such a large amount of construction waste generated every year is recycled as a roadbed composition material or a filling composition material for road construction, and most of the rest is buried without disposal. In fact, it is causing severe soil contamination by being dumped or dumped without permission.

By the way, a part of the construction waste described above is reprocessed by a construction waste intermediate treatment company, for example, by the following method to produce recycled aggregate. In the case of recycled aggregate that does not meet the quality standards required for aggregate, there is a practical limit to the field of application in which recycling is performed.

[0004] That is, as a conventional technique used by existing construction waste intermediate treatment companies, what form of prior art for producing recycled aggregate using waste concrete is being implemented is attached. This will be described with reference to FIGS.

For example, as shown in FIG. 1, first, the waste concrete soul is separated from the waste concrete soul via a hopper 1 and a feeder 3, and then the primary jaw crusher ( The powder is crushed by a Jaw Crusher (7) and further fed to a vibrating screen (11) via a feed conveyor (9) to separate the stone powder (13) by the vibrating screen (11). Then, the waste concrete soul is secondly crushed again by a cone crusher (Cone Crusher) 15, separated into sand 21, aggregate 23 and aggregate 25 by a screen 19 through a feeding conveyor 17, and again. The processing is performed by a method of returning to the cone crusher 15.

Next, in the case of the other example shown in FIG. 2, similarly to the example shown in FIG. 1, the hopper 1, the feeder 3, the primary jaw crusher 7, the feeding conveyor 9, and the vibration screen After passing through 11, a process of removing impurities through a blower (Blower) 27 and a classifier 29 is added.

In the other example shown in FIG. 3, as shown in FIGS. 1 and 2, the hopper 1, the feeder 3, the primary jaw crusher 7, and the feed conveyor 9 are the same, and thereafter, The process of passing through the rotating screen 31, the blower 33, the secondary jaw crusher 35, the feed conveyor 37, the vibrating screen 39, and the tertiary crusher 41 such as an impact breaker is a different process. The subsequent steps of following the feed conveyor 17 and the screen 19 are the same as those in the example of FIG. 2 described above.

However, even if the above-mentioned crusher 41 such as the cone crusher 15 or the impact breaker is adopted as a secondary or tertiary crushing facility, when considered in a strict sense, this is not an improvement in the grain type, but merely a regeneration. It is responsible for part of the crushing process for producing aggregate.

As described above, various conventional methods for producing recycled aggregates crush waste concrete in the first to third order to remove impurities, soil powder, or stone powder before or otherwise during the crushing process. It can be seen that only the process and the process of classifying the crushed waste concrete by its size are performed. However, such a conventional production method has the following problems.

[0010] That is, in the conventional production method, in the case of crushed waste concrete, the crushing process is forcibly followed, so that the grain type becomes crushed stone in the crushing process and the amount of mortar adhered. In addition to the increase in the amount of soft stones, the state in which the ratio of soft stones is high and the fine powder such as cement and sand adheres to the surface of the aggregate, it is necessary to reach a predetermined quality standard in order to use it as it is. However, since the surface is not hard even when used as aggregate, there is a possibility that deformation and fragile parts may occur after construction, and there is an unstable problem in using it as aggregate.

Secondly, in the case of crushed waste concrete, a part of the concrete is sometimes produced in a pure aggregate form, but most of the aggregate has cement or mortar attached to the surface of the aggregate. In form or otherwise, the mortar will be in a solidified form, but with these cements or mortars, it is fragile and unsuitable for use as aggregate.

[0012]

[Problems to be solved by the invention]

 The present invention has been researched and developed to solve the above-mentioned problems that occur during the production process of recycled aggregate.

[0013] That is, the main object of the present invention is to remarkably improve the grain shape formed sharply after the crushing of waste concrete in the production process of recycled aggregate and to improve the cement attached to the surface of the aggregate. It is intended to improve the quality of recycled aggregate by reducing the ratio of soft stones by removing mortar and mortar effectively.

Another object of the present invention is to improve the grain size of the crushed waste concrete more effectively, so that the friction between the intermediate aggregates or the internal structure constituting the intermediate aggregate and the device is improved. It is intended to provide a device that can more effectively perform mutual friction with elements.

Another object of the present invention is to provide a device which has a relatively simple structure, is easy to manufacture, is convenient to operate, and further has powdery and granular materials generated in the process of improving the grain shape and performing surface treatment. It is an object of the present invention to provide a device that can continuously and efficiently separate the water.

[0016]

[Means for Solving the Problems]

 The invention according to claim 1 includes a cylindrical main body having a space therein, a rotating roll that rotatably supports the cylindrical main body at an installation location thereof, and an external drive source for rotating the cylindrical main body. The cylindrical body is provided with a waste concrete lump input portion on one side and a waste concrete recycled aggregate discharge portion is provided on the other side, while the internal space of the cylindrical body has a large number of rooms. And a passage is formed at the center thereof, and the cylindrical main body is arranged so as to be inclined so that the input portion side is higher than the discharge portion side.

According to a second aspect of the present invention, in the apparatus according to the first aspect, a rotating roll is installed at a position facing a rotating rail member fixedly installed on an outer peripheral edge of the cylindrical main body. A projecting portion located inside the rotating rail member is formed so that the projecting portion prevents the rotating rail member from separating from the rotating roll when the cylindrical body rotates. It is characterized by having.

According to a third aspect of the present invention, there is provided an apparatus for improving the grain size and quality of a recycled concrete aggregate according to the first or third aspect, wherein an aggregate supply port and a water supply port are provided. The aggregate supply port and the water supply port are disposed so that the tip ends thereof reach the charging section, and a screen and a brush that comes into contact with the outside of the screen are provided outside the discharge section of the cylindrical body. In addition, a water injection nozzle is disposed in the screen, and a hopper for receiving a discharge discharged from the screen is provided at a lower discharge portion of the screen.

According to a fourth aspect of the present invention, in the device according to any one of the first to third aspects, a friction member is provided on an inner peripheral surface of the internal space of the cylindrical main body, and a fixed angle is provided. Each of them is provided with a blade.

The invention according to a fifth aspect is the device according to the fourth aspect, wherein the blade is installed so as to be inclined with respect to the friction member.

The above-described objects and features of the present invention will be apparent from preferred embodiments of the present invention described below.

[0022]

[Embodiment of the invention]

 Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The concept of the grain type and quality improvement device of the present invention is as follows. The crushed waste concrete is placed in a cylindrical cylindrical main body 60 which is rotatably provided at an installation place by an external drive source 50. The intermediate aggregate and water are simultaneously introduced, and the cylindrical main body 60 is rotationally driven by the external drive source 50, so that the crushed waste concrete is placed between the intermediate aggregates or with the intermediate aggregate in the cylindrical main body 60. The collision is made between the cylindrical main bodies 60 so as to improve the grain shape and quality.

That is, the intermediate aggregate of waste concrete accommodated in the cylindrical main body 60 moves along the inner wall of the cylindrical main body 60 by its own weight by the rotation of the cylindrical main body 60 by the external drive source 50. However, during the movement process, adjacent intermediate aggregates collide with each other, or the intermediate aggregates collide with the inner wall of the cylindrical main body 60, thereby causing a frictional or rolling contact phenomenon, resulting in an intermediate intermediate aggregate. While the aggregate undergoes the crushing or breaking action, it also undergoes the action of crushing between the particles, causing the weak particles to be broken and the angular particles to change to a round spherical shape with no corners. The above-described phenomena are repeatedly performed until the particles are discharged from the discharge portion 90 to the outside, so that the grain type and quality of the aggregate are improved.

That is, several preferable examples of the above-described concept are shown in FIGS. 5 to 10, which show a cylindrical main body 60 having a space therein, It comprises a number of rotating rolls 70, 72 for supporting and rotating the mold body 60 at the lower part, and an external drive source 50 for rotating the cylindrical body 60 at its installation location. An input section 80 is provided at one end, and an output section 90 is provided at the other end. The internal space of the cylindrical main body 60 is divided into a number of rooms, and the center of the partition wall is located at the center. A passage 68 is formed.

The cylindrical main body 60 is installed so as to be inclined so that the input section 80 is positioned higher than the discharge section 90, so that the intermediate aggregate input from the input section 80 gradually moves toward the discharge section 90. It is desirable to be able to do so.

As a method of installing the cylindrical main body 60 so as to be inclined as described above, the rotating roll 72 installed near the input section 80 side among the plurality of rotating rolls 70 and 72 is moved closer to the discharge section 90 side. The rotating roll 70 may be arranged higher than the installed rotating roll 70, or the center of rotation between the two rotating rolls 70 and 72 may be the same, but the diameter of the rotating roll 72 may be configured to be larger than the diameter of the rotating roll 70. Good.

As shown in FIG. 4, the rotating rolls 70 and 72 are provided at positions facing rotating rail members 74 and 76 provided on the outer peripheral edge of the cylindrical main body 60. , 72 are formed with protrusions 71, 73 located inside rotation rail members 74, 76, respectively, so that the rotation rail members 74, 76 are separated from the rotation rolls 70, 72 when the cylindrical main body 60 rotates. The detachment is prevented by the protrusions 71 and 73.

An external drive source 50 for rotating the cylindrical main body 60 is provided between the cylindrical main body 60 and the base 100. The external drive source 50 is also provided in FIG. As shown, a sprocket wheel 52 is provided on the outer peripheral edge of the cylindrical main body 60, and a drive motor 54 is installed on the base 100, so that a power is supplied between the sprocket wheel 52 and the sprocket wheel 56 of the drive motor 54. The transmission chain 58 is bridged.

As the power transmission means of the external drive source 50, a gear meshing method or a driving force transmission method using a belt can be selected.

As shown in FIG. 5, guides 82 and 92 are respectively provided inside the above-described charging section 80 and the discharging section 90, and are guided by the guides 82 and 92 into the cylindrical main body 60. The guides 82 and 92 facilitate the feeding of the intermediate aggregate and the material to be fed into the cylinder and the discharge of the recycled aggregate and the material processed in the cylindrical main body 60.

In order to automatically or continuously supply the aggregate, as shown in FIG. 10, an aggregate supply port 84 and a water supply port whose leading ends reach the input section 80 are also provided. 86 may be provided separately.

A cylindrical screen 94 formed of a perforated plate or a perforated mesh is provided outside the discharge portion 90 of the cylindrical main body 60. Above the cylindrical screen 94, a screen is provided. A brush 96 is disposed so as to be in contact with the outer surface of the cylindrical screen 94, and a water jet nozzle 98 is provided in the cylindrical screen 94, and the water discharged from the cylindrical screen 94 is provided at a lower discharge portion of the cylindrical screen 94. A hopper 99 for receiving sand and sand is provided.

As shown in FIG. 6, a plurality of planar friction members 62 defining a polygonal cross section in the length direction are provided on the inner peripheral surface of the internal space in the cylindrical main body 60 as shown in FIG. 8, or as shown in FIG. 8, a large number of uneven friction members 64 are provided. Further, in the internal space of the cylindrical main body 60, as shown in FIG. The blades 66 are provided so as to enhance the friction and retention effect of the aggregate.

When the blades 66 are installed, the blades 66 may be installed adjacent to the flat friction member 62 or the uneven friction member 64, or may be inclined to the friction members 62, 64. It is desirable to further enhance the effect of crushing, retaining, and breaking of the internal intermediate aggregate when the cylindrical main body 60 is rotated by the installation.

In the apparatus having the above configuration, it is possible to install and use it as a unique treatment even in a production line that crushes waste concrete and produces it with recycled aggregate. When it is installed and used in a production line that produces crushed concrete, the sand and fine bone generated during the crushing process of waste concrete via various crushers 7, 15, 35, and 41 shown in FIGS. It is desirable to install it in the process after separating the materials.

Next, the operation of the device having the above configuration will be described.

First, the cylindrical main body 60 is driven to rotate by the external drive source 50, and the intermediate aggregate of waste concrete crushed in the pretreatment step is supplied to the input section 80 through the aggregate supply port 84. At the same time, water is supplied through the water supply port 86, and accordingly, the intermediate aggregate of waste concrete is gradually partitioned on the guide 82 from the input portion 80 inside the cylindrical main body 60. The space moves through the passage 68.

At this time, the intermediate aggregate and water fed into the partitioned space are not slid at the bottom by the friction members 62 or 64 due to the continuous rotation of the cylindrical main body 60, and stay on the way. Then, when reaching a position where it cannot withstand any more, the aggregates in the overlapped state roll down in a state of being entangled with each other.

Further, when the blades 66 are installed, the blades 66 continuously retain intermediate aggregates and continuously friction between the intermediate aggregates or between the intermediate aggregates and the friction members 62 or 64. If the intermediate aggregate reaches a position where the stagnation is impossible, the intermediate aggregate overflows to the lower part and entangles with the upper part of the friction member 62 or 64 and rolls. The above-described operation is repeatedly performed while passing through, and gradually moves to the discharge unit 90 side.

By the rotation operation of the cylindrical main body 60, the above-described operations such as crushing, staying, and breaking are repeatedly performed, while the sharp edges and internal cracks of the intermediate aggregate generated in the crushing process are generated. The brittle parts are separated by abrasion, and the intermediate aggregate changes to a spherical grain type, and most of the cement and mortar attached to the surface of the intermediate aggregate are also inter-aggregate. It is separated from the intermediate aggregate by the frictional action, and as a result, it is possible to obtain recycled aggregate in which the adhesion rate of cement and mortar to the recycled aggregate is greatly reduced, and the quality of the recycled aggregate can be greatly improved. .

As described above, the regenerated aggregate whose grain shape has been improved and whose quality has been improved moves into the cylindrical screen 94 via the guide 92 of the discharge section 90, and the cylindrical screen 94 As a result, foreign matters such as sand, cement, and water separated from the recycled aggregate follow the screen 94 and are discharged to the hopper 99 below.

At this time, the fine particles such as sand and cement adhered to the surface of the recycled aggregate are washed by the water jetted from the jet nozzle 98, and in such a washing process. When the holes of the screen 94 are partially blocked by the fine powder, the blocked portion is opened again by the rotational driving of the brush 96.

Thus, only the recycled aggregate having improved quality as described above is discharged from the cylindrical screen 94 to the outside and can be used as the recycled aggregate.

In the above, the present invention has been described in detail with reference to the embodiments. However, the present invention is not limited to the above embodiments, and any person having ordinary knowledge in the technical field to which the present invention belongs can be used. For example, the present invention can be modified or changed without departing from the spirit and spirit of the present invention.

[0046]

[Effect of the invention]

 As described above, according to the present invention, various problems that occur during the production process of the conventional recycled aggregate are solved, and the cement, mortar, etc. attached to the surface of the aggregate can be efficiently removed. To reduce the generation of soft stones and to dramatically improve the quality of recycled aggregate, so it can be used, for example, as an asphalt concrete aggregate for base layers and surface layers, as well as for other uses. It is now possible to obtain recycled aggregate that can be used in a wide range of aggregates.

Further, according to the present invention, the surface treatment is performed while simultaneously improving the grain type of the crushed waste concrete intermediate aggregate more effectively. Acts such as friction, stagnation and breakage with the friction members and blades in the mold body can be performed more effectively.

When a cylindrical screen, a brush, or a spray nozzle is adopted, fine powder and water such as sand and cement generated in the process of improving the grain type of the intermediate aggregate and performing surface treatment are removed. It can be efficiently separated from the material.

[Brief description of the drawings]

FIG. 1 is a system diagram for explaining a conventional method of producing recycled aggregate using waste concrete.

FIG. 2 is a system diagram for explaining a conventional method of producing recycled aggregate using waste concrete.

FIG. 3 is a system diagram for explaining a conventional method for producing recycled aggregate using waste concrete.

FIG. 4 is a system diagram for explaining the concept of the present invention.

FIG. 5 is a longitudinal sectional view showing a desirable example of the device illustrated by specifically realizing the concept illustrated in FIG. 4;

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a longitudinal sectional view showing a modified example of the embodiment illustrated in FIG. 6;

8 is a longitudinal sectional view showing another modification of the embodiment illustrated in FIGS. 6 and 7. FIG.

FIG. 9 is a left side view of FIG.

FIG. 10 is a cross-sectional view of a modification in which a part of the configuration of the embodiment shown in FIG. 5 is added.

[Explanation of symbols]

 Reference Signs List 60 Cylindrical main body 68 Passage 70, 72 Rotating roll 71, 73 Projecting part 74, 76 Rotating rail member 80 Input part 84 Aggregate supply port 86 Water supply port 90 Discharge part 94 Cylindrical screen (screen)

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 5, 2001 (2001.7.5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Continuing on the front page (72) Inventor Jang Pyung Mu 901 Mok-dong 126 Mok-dong Apartment, Seoul, Korea

Claims (5)

[Utility model registration claims] A cylindrical body having a space therein, a rotating roll for rotatably supporting the cylindrical body at an installation location thereof, and an external drive source for rotating the cylindrical body, the cylindrical body comprising: Provided on one side of the shaped body is an input portion for waste concrete lump, and provided on the other side is a discharged portion for waste concrete recycled aggregate, while the internal space of the cylindrical body is partitioned into a number of rooms, A passage is formed at the center thereof, and the cylindrical main body is arranged so as to be inclined so that the input portion side is located higher than the discharge portion side. Improvement device. 2. The rotating roll is installed at a position facing a rotating rail member fixedly installed on an outer peripheral edge of a cylindrical body, and the rotating roll has a protruding portion located inside the rotating rail member. And a protrusion configured to prevent the rotating rail member from separating from the rotating roll when the cylindrical body rotates.
2. The grain type and quality improvement device for waste concrete recycled aggregate according to 1. 3. An aggregate supply port and a water supply port are provided, and the aggregate supply port and the water supply port are disposed so that the tips thereof reach the input section. A screen and a brush in contact with the outside of the screen are installed on the outside, a water jet nozzle is arranged in the screen, and a hopper for receiving the discharge from the screen is installed at a lower discharge part of the screen. 4. The grain type and quality improvement device for recycled aggregate of waste concrete according to claim 1 or claim 3. 4. The waste concrete according to claim 1, wherein a friction member is installed on the inner peripheral surface of the internal space of the cylindrical main body, and blades are installed at regular intervals. A device for improving the quality and quality of recycled aggregate. 5. The apparatus as claimed in claim 4, wherein the blades are installed so as to be inclined with respect to the friction member.