KR101302865B1 - Mortar exfoliation device for recycled aggregates using multiplex delay boards - Google Patents

Abstract

PURPOSE: A mortar exfoliation device for recycled aggregates using multiplex delay boards is provided to improve a exfoliating ability and to improve a grain shape by increasing time and density of contact between a stirrer, a cylinder, and an aggregate. CONSTITUTION: A mortar exfoliation device for recycled aggregates using multiplex delay boards comprises a main frame (10) formed of a square frame; a cylinder (20) that is installed on the main frame at a constant grade to be rotated by a driving apparatus (21) and includes wavy bumps (23) for avoiding friction contact with the aggregate on an inner surface; multiplex delay boards (30) that are formed of multiple fixed ring plates arranged and fixed on the cylinder and divides an inside of the cylinder into partitions such that a space (22) between the cylinder and the fixed ring plate is gradually reduced by gradually increasing an external diameter of the ring plate from a side of an inlet to a side of an outlet of the cylinder; and a stirrer (40) that includes stirring wings at a constant interval on a central axis so as the stirring wings are rotated in the cylinder by a driving device (43) connected to the central axis. Thus, exfoliation is performed as the inserted aggregate gradually passes through the space divided by the multiplex delay boards while the stirrer and the cylinder rotate in reverse directions.

Description

Mortar Exfoliation Device for Recycled Aggregates Using Multiplex Delay Boards}

The present invention relates to a circulating aggregate peeling device for concrete for peeling off the mortar attached to the waste concrete in the process of producing circulating aggregate for recycling of concrete, in particular by a delay board formed at a predetermined interval inside the rotating cylinder Improving the cylindrical structure in the circulating aggregate peeling device for concrete using multiple delay boards by increasing the impact of mortar peeling by increasing the impact of the stirrer and the friction contact between aggregates by delaying the input aggregates in the cylinder step by step. Efficiently discharge dust from raw aggregates, and in the final discharge stage of aggregates, the separation device is configured to simultaneously improve the shape and suction removal of fine dust. Recycled aggregate production That relates to a peeling device for recycled aggregate concrete.

The waste concrete generated during the demolition of the structure is mixed with aggregates, metals such as cement and reinforcing steel, and various foreign substances included in the demolition process, and an intermediate process of separating and selecting these materials is performed to recycle them.

Intermediate treatment of waste cones includes a crushing process that uses a plurality of crushers with various crushing crushers to crush it into aggregate size for recycling, and a separation process for separating and separating reinforcing bars or foreign substances using wind, magnetic force, and manpower. It consists of a continuous process that is configured for a series of recycling applications, such as a sorting process that separates screens into various particle sizes by recycling screens.

Recycled aggregates produced by crushing waste cones have mortar coated on some surfaces of raw aggregates. Therefore, when the coated cement powders such as mortars are used as concrete aggregates, they affect absorption rate, alkali aggregate reaction and safety. Crazy

When the aggregate with high absorption rate is used for concrete mixing, the water required for hydration of cement is absorbed by the aggregate so that the hydration process is terminated without reaching the maximum strength, resulting in poor strength, durability, watertightness, and resistance to freeze-thawing.

Alkaline aggregate reaction is performed by unhydrated mortar, and the reactive silica contained in the aggregate reacts with potassium, sodium or calcium hydroxide in cement to form gel around the aggregate, which meets with moisture to swell, crack and freeze-thaw Cause.

Aggregates that have undergone shredding are also angled and have sharp edges, which reduce the strength of the concrete product and reduce the rate of filling.

Therefore, in order to use the circulating aggregate for concrete use, it is essential to remove the mortar contained in the raw aggregate, improve the shape of the aggregate, and separate and remove the fine elements. Peeling devices in various ways have been proposed.

Korean Patent No. 10-0484295 proposes a device for desorbing mortar due to the action of shearing and frictional forces between particles or in a device in a fluid flowing by stirring for a predetermined time with rotating blades having different vertical directions in a state where aggregate is introduced into a water tank. Doing.

Korean Patent Nos. 10-0643654 and 10-0643655 apply a heat or water to a dry dual rotating drum aggregate regenerator in which a circular inner drum and an outer drum rotate in opposite directions to each other. A technique for desorbing mortar while giving double impact to aggregates between the casing liners of a drum is proposed.

Republic of Korea Patent No. 10-0616606 proposes a technique for removing the mortar by installing a rotating plate inside the cylindrical body and a free rotating impactor with a rubber cap on the outside of the rotating plate by the friction between the body and the impact and the rubber cap, Republic of Korea Patent Registration 10-0898187 proposes a technique to shake off the mortar using a cylindrical brush.

Republic of Korea Patent Registration 10-0943230 is a peeling device for inducing the impact fracture and friction crushing by the impact plate portion of the drum-type cement paste peeling portion and the washing plate projections of the outer wall liner to the regenerated fine aggregate is rotated along the drum-type cement paste peeling portion Korean Patent Laid-Open Publication 10-2012-0054796 proposes a technique for removing mortar attached to a surface of a circulating aggregate by increasing friction between the circulating aggregate and the friction plate and between the circulating aggregate using a conical friction plate.

In addition, the Republic of Korea Patent Registration No. 10-1147253 is a crushing tank having an inlet in the upper portion, the outlet is formed in the bottom; a liner detachably mounted through the fastener on the inner wall surface of the crushing tank; It is installed and rotates in place through the drive means including a blow drum to blow and scatter the aggregate injected into the crusher to the liner side, the blow drum is a rotary shaft rotated by a drive motor, the rotary shaft of the A plurality of support wings are formed at regular intervals from each other along the axial direction at the circumference, the striking pad is fixed to the support wings while being arranged at regular intervals from each other along the circumferential direction on the circumferential direction of the support wings, the support Neighboring ends, arranged at regular intervals along the circumferential direction between the wings and the striking pads Are fixed to the support wings present a separation device including a crack inducing rods of circular cross-section of a non-liner side of the aggregate from falling through said striking pad.

The existing peeling device is a member that peels the mortar on the surface of the recycled aggregate by various methods such as hitting or physically impacting, rubbing with a stirring device and drum, or brushing off. It is applied.

The brushing method has a disadvantage of low peeling effect and low production capacity when exposed to peeling for a short time, so that the impact between the aggregate and the housing and the collision between the aggregates by blow is caused to shake off the mortar attached to the raw aggregate. In general, the grinding method is applied to at least three times of crushed raw aggregates during the intermediate treatment process, which is exposed to fatigue. There was a problem of deteriorating the quality performance as a material for concrete because it was broken in an angular and angular form. In particular, the vertical drum batch structure having a short passing time of the peeling device of the aggregate is more intense because the impact of the crack of the raw aggregate is more highlighted.

For this reason, the horizontal drum layout structure is more useful because the impact and friction is properly reflected to alleviate the crack problem of the aggregate. However, the recycled aggregate plant is composed of a continuous processing system, so the input and discharge of aggregate is continuous. Should consist of Even in the horizontal drum arrangement structure, a constant gradient must be given to the drum, so the time required for the circulating aggregate to be peeled off is short, and there is a method of lengthening the drum long enough to extend it. Drum length extension is also limited because it causes vibration and impedes driving.

For this reason, the peeling performance of the conventional horizontal drum arrangement structure was limited. In addition, the peeling process is performed in a state in which the mortar and cement powder separated from the raw aggregate are mixed with the raw materials, thereby reducing the peeling efficiency by lubrication by the load and the fine powder, and further performing the washing or sorting process in the final step. As a result, separate raw materials and mortar should be separated and there was a problem in that an additional facility and time cost for performing the process were generated.

The present inventor has proposed a peeling device according to Patent 1244089 and Patent 1244066 in order to solve the problems of the existing technology, which is produced by the intermediate treatment process of concrete, as shown in Figure 1 separated by size A concrete aggregate aggregate peeling device for producing concrete aggregates by inputting the selected recycled aggregates, the apparatus comprising: a main frame 10 composed of a rectangular frame body; A cylindrical drum 20 installed in a predetermined gradient on the main frame 10 so as to be rotated by the driving device 21; A plurality of stationary disks 31 and a fixed drum 31 are arranged to have a predetermined distance along the longitudinal direction of the cylindrical drum, the space 22 is maintained at a constant interval with the inner surface of the cylindrical drum 20, the cylindrical drum 31 It consists of a plurality of fixing bars 32 for fixing to the main frame through the cylindrical drum for fixing therein, the fixed disk is fixed to the cylindrical drum by increasing the outer diameter step by step from the input side of the cylindrical drum to the discharge side A multiple delay board (30) for dividing and partitioning the inside of the cylindrical drum such that the space 22 between the disks is gradually reduced; The central shaft 41 penetrates through the center of the stationary disk 31 of the delay board 30, and both ends thereof are rotated on the main frame, and stirring blades 42 are installed at regular intervals on the central shaft. And agitator 40 configured to rotate inside the drum by a drive device 43 connected to 41).

The structure of the cylindrical drum is partitioned by multiple delay boards (delay board), the multi-stage space formed between the cylindrical drum and the stationary disk is a stirrer and the cylindrical drum by delaying the injected aggregate into the partitioned space in the cylinder step by step and The contact time between aggregates is increased and the contact density is increased, so that the peeling performance is improved, and the shape of the mold is improved, and the cylindrical drum is composed of a screen, which simultaneously separates and discharges fine powder, thereby increasing the peeling effect. .

KR101244089 B1 KR101244066 B1 KR100484295 B1 KR100643654 B1 KR100643655 B1 KR100616606 B1 KR100943230 B1 KR101147253 B1 KR1020120054796 A1

The present invention further improves the peeling apparatus according to Patent 1244089 and Patent 1244066 described by the present inventors, and does not require a separate post-processing facility such as a water washing process for fine powder separation or a screening process for separating and separating mortar particles. Applied to the final process of circulating aggregate production facility as a single process, continuously producing circulating aggregate that satisfies the quality of circulating aggregate for concrete, and presenting circulating aggregate peeling device for concrete which simultaneously peels off, finesse separation and shape improvement Have a purpose to do.

The present invention presented for this purpose is a circulating aggregate peeling device for concrete produced by the input of a circulating aggregate separated by size, produced by an intermediate treatment process of waste concrete, and produced for concrete, comprising: a main frame composed of a rectangular frame; A cylinder installed on the main frame with a predetermined gradient so as to be rotated by the driving device, and having a protrusion formed on the inner surface thereof for frictional contact with the aggregate; It is composed of a plurality of fixed disks that are spaced at a constant distance from the inner surface of the cylinder and arranged to be fixed to have a predetermined interval along the longitudinal direction of the cylinder, the fixed disk is a step by step the outer diameter toward the discharge side from the input side of the cylinder A multiple delay board for dividing and dividing the inside of the cylinder so that the space between the cylinder and the stationary disk is reduced step by step; The central axis penetrates through the center of the fixed disk of the delay board, and both ends thereof are rotated and supported on the main frame, and stirring blades are installed at regular intervals on the central axis, and are configured to rotate inside the cylinder by a driving device connected to the central axis. In the circulating aggregate peeling device for concrete using a multi-delay board comprising a stirrer and the aggregate is put in a state in which the stirrer and the cylinder is rotated in a reverse rotation with each other step by step through the space partitioned by the multiple delay board ,

The cylinder is composed of a cylindrical portion having a length of 2/3 or more in the first half and a cylindrical screen portion having a length of 1/3 or less in the second half, wherein the cylindrical portion is divided into three to four circumferential cylindrical boards in a cylindrical length direction. It is coupled to the outer frame so that a constant space is formed, and the space part is provided with a differential discharge device consisting of a screen board supported by a spring unit and a protrusion bar protruding into the cylinder of one side thereof. It consists of a structure that discharges the mortar particles and fine powder generated in the peeling process to the outside of the cylinder,

Stirring blades of the stirrer are formed only in the cylindrical portion such that the end thereof is close to the cylinder, and each of the stationary disks constituting the multi-delay board is fixed to the cylinder by a bracket, the cover to surround the top of the cylinder It is installed, characterized in that the dust suction port is connected to the dust collector in the cover.

In addition, the present invention, the shock absorbing device is applied to the cylindrical screen portion, the shock absorbing device is divided into a circular screen board consisting of three to four cylindrical screen, the divided arc-shaped screen between the screen in the longitudinal direction The T angle bar is configured as a frame so that the tip protrudes into the screen board, and each arc-shaped screen board uses a spring unit to apply a shock absorbing device having a structure coupled to the cylindrical portion and the T angle bar.

According to the present invention by the above configuration, the cylinder is partitioned by multiple delay boards (delay board), the multi-stage space formed between the cylinder and the stationary disk delays the coarse aggregate of the mortar adhesion of the injected aggregate for a longer time, the cylinder By delaying the partitioned space in stages, the contact time between the stirrer, the cylinder and the aggregate is increased, the contact density is increased, the peeling performance is improved, and the shape of the mold is improved.

In addition, the friction contact between the aggregates induced by the rotation of the stirrer and the cylinder and the impact applied appropriately act on the cylindrical portion, so that the mortar attached to the circulating aggregate is effectively peeled off, and compared to the aggregate such as the separated mortar particles. The small particles are collected into the space formed between the arc boards, and the differential discharge device formed in the space discharges and separates the mortar and the granules down the cylinder by vibrating the screen board due to the action of the spring unit and continuous load variation. In the upper part of the cylinder where the load is removed, the floating dust generated during the peeling process is discharged through the screen by the suction of the dust collector, thereby preventing the fine powder and the small particles formed by the peeling from buffering during friction contact between aggregates. Is done.

In addition, the aggregate introduced into the cylindrical screen portion constituting the second half of the cylinder is scattered and dispersed by the baling formed by the rotation of the cylinder and the corrugated protrusion formed on the cylindrical surface without being affected by the stirrer, and the dust collector through the screen The suction pressure of is directly acted on, so that the dust is sucked and removed, and most of the fine substance classified as the size below 0.08MM is sucked and removed. Therefore, the post-process for separating from raw aggregates such as washing or screening can be omitted, thereby simplifying the installation and reducing the process by reducing the cost.

In addition, the present invention by applying the shock absorbing device to the cylindrical screen portion constituting the second half of the cylinder exhibits the shock absorbing performance during the impact of the aggregate, the durability of the screen is improved, the discharge of small cement masses is made more smoothly.

1 is a structural diagram of a circulating aggregate peeling device for concrete using a conventional multi-delay board
2 is a structural diagram of a circulating aggregate peeling device for concrete using a multi-delay board according to the present invention
3A and 3B are cross-sectional and partial cross-sectional views showing an embodiment of a cylinder.
FIG. 4 is a cross-sectional view of aa part of FIG. 3A
5 is a cross-sectional view of the bb part of FIG. 3A.
FIG. 6 is a cross-sectional view of the cc portion of FIG. 3A
7 is another embodiment of the cylinder
8 is a cross-sectional view of the cylindrical screen portion of FIG.
9A and 9B are operational state diagrams of the present invention.

2 to 6 are for showing the basic configuration of the present invention, the present invention is produced by the intermediate treatment process of the waste concrete, the concrete for producing the circulating aggregate for concrete by inputting the circulating aggregate separated by size It constitutes a circulation aggregate peeling device for the product.

The present invention, the main frame 10 is composed of a rectangular frame body; A cylinder (20) provided with a constant gradient on the main frame (10) to be rotated by the driving device (21) and having a corrugated protrusion (23) for frictional contact with the aggregate on an inner surface thereof; The inner surface of the cylinder 20 and the space 22 of constant intervals are maintained and consists of a plurality of stationary disks 31 which are arranged and fixed to the cylinder to have a predetermined distance along the longitudinal direction of the cylinder, the stationary disk is a cylinder A multiple delay board 30 for dividing and dividing the inside of the cylinder so that the space 22 between the cylinder and the fixed disk is gradually reduced by increasing the outer diameter step by step from the input side to the discharge side; The central shaft 41 penetrates through the center of the stationary disk 31 of the delay board 30, and both ends thereof are rotated on the main frame, and stirring blades 42 are installed at regular intervals on the central shaft. A stirrer 40 configured to rotate inside the cylinder by a drive device 43 connected to the head 41). It is applied to the circulating aggregate peeling device for concrete using multiple delay boards configured to be peeled off while passing.

The present invention is a circular aggregate peeling device for concrete using the multi-delay board, wherein the cylinder 20 is a cylindrical body 24 having a length of 2/3 or more in the first half and a cylinder having a length of 1/3 or less in the latter half. Screen portion 25, wherein the cylindrical portion is coupled to the outer frame 26 so that the arc-shaped board 241 divided into three to four circumferential shape is formed in the cylindrical longitudinal direction and the space portion ( 242 is provided with a differential discharge device 27 consisting of a screen board 272 supported by the spring unit 271 and a projection bar 273 protruding inwardly of one cylinder thereof, and peeling by vibrating according to the load change. It is made of a structure for discharging the fine powder produced in the process to the outside of the cylinder, the stirring blade 42 of the stirrer 40 is formed only in the cylindrical body 24 so that the end thereof is close to the cylinder, the multiple delay board 30 ; delay board configuration Each stationary disk 31 is fixed to the cylinder with a bracket 32, the cover 11 is installed to surround the upper portion of the cylinder 20, the dust inlet connected to the dust collector (50) inside the cover ( 51) is installed.

The main frame 10 is formed in a rectangular frame structure to support the cylinder 20 and the stirrer 40 to achieve a stable rotational drive, to protect the internal peeling environment from the external environment, scattering dust and noise Blocking is carried out in a structure that the cover 11 is attached to the upper portion for the internal component protection and worker safety.

In addition, the main frame is a hopper 12 is formed on the side of the inlet of the cylinder to be described later when the hopper for the input according to the configuration of the aggregate aggregate production plant to perform the intermediate treatment process of the waste concrete particles of a certain size It is configured to receive continuously input aggregate produced by the conveyor system.

The cylinder 20 according to the present invention is for inducing peeling of the mortar during the contact process by friction with the aggregate, and connected to the driving device 21 in a state where both ends are supported on the main frame. It is installed with a constant gradient so as to pass through the inner wall of the cylinder and discharge through it.

 Corrugated protrusions 23 are formed on the inner wall of the cylinder 20 to increase aggregate contact resistance, provide aggregate agitation effects, and act to facilitate peeling by applying appropriate frictional pressure to the aggregate.

The cylinder is configured to maintain the rotational speed of about 10 ~ 30RPM in accordance with the radius in consideration of gravity and centrifugal force, the driving device 21 is the cylinder 21 to the roller 211 to the main frame 10 It is connected by the electric motor 212 and the chain 213 in the supported state or by the roller shaft direct connection transmits the rotational driving force.

The multiple delay board 30 is a device for increasing the peeling effect by keeping the injected aggregate in the cylinder for a proper time, and a plurality of stationary disks 31 installed inside the cylinder and the stationary disk 20 It consists of a plurality of brackets (32) fixed to.

The delay of the aggregate by the multiple delay board is a relative delay according to the aggregate size. In other words, the residence time of the injected aggregate in the cylinder is affected by several factors such as the gradient applied to the cylinder, the rotational speed of the cylinder, the rotational speed of the stirrer, and the size of the space applied between the fixed disk and the cylinder described below. Larger aggregates (aggregates that are more likely to be mortar coated) are less likely to pass through space than smaller aggregates (aggregates that are likely to consist only of raw aggregates with relatively no mortar), resulting in more delay and More delamination opportunities are provided, resulting in improved delamination effects and maintaining continuity and balance between input and discharge.

The continuity and balance between the input and discharge is also achieved by the weight loss through the discharge of the separation mortar and fine dust from the fine discharge device and the cylindrical screen, which will be described later, whereby the input aggregate accumulates in the cylinder due to the delay caused by the delay board. Continuous operation is possible with a constant peeling load without work.

The fixed disk 31 is fixed to the cylinder that rotates relatively low speed compared to the stirrer can reduce the wear caused by the aggregate contact and can reduce the load, the end of the stirring blade of the stirrer to be described later to be formed to be close to the cylinder Can be. This is different from the structure of fixing the fixed disc by the fixed bar in the concrete aggregate aggregate peeling device using the multi-delay board presented by the structural difference such that the input aggregate is stirred more deeply, and relatively low speed (about 200rpm) It can be configured to be peeled off by friction between the aggregates by agitation rather than the impact effect by stirring with, thereby improving the shape of the mold without causing damage such as cracks, which lowers the aggregate strength. You can get aggregate.

The fixed disk is divided into three to four parts to be configured to be assembled within the cylinder, and to prevent the wear due to the aggregate contact can be attached to the rubber protective plate 311 as a consumable on the aggregate contact surface.

The delay board is to provide a multi-stage divided space for delaying aggregates within a cylinder without interfering with the rotation of the cylinder and the stirrer, which rotate in opposite directions, and a space spaced apart from the inner surface of the cylinder 20 at regular intervals. It arranges 4-6 pieces in the longitudinal direction along the length of a cylinder so that 22 may be maintained.

Multi-stage fixed disks increase the exposing effect by increasing the time exposed to peeling by increasing the contact density between aggregates by mitigating the flow of relatively large aggregates, which are likely to be covered with mortar, and delaying them for a certain period of time. Let's do it.

The space 22 is configured to gradually increase the outer diameter of the fixed disk as it goes from the input side of the cylinder to the discharge side so that the space 22 between the cylinder and the fixed disk is gradually reduced. The space size is chosen to be appropriate for the separation process, with the input of aggregate and emissions after treatment being balanced.

In such a configuration, when the cylinder is divided into four zones using four stationary disks as shown in the illustrated embodiment, the installation interval of the stationary disks is configured to be smaller toward the discharge side, thereby delaying the unit area delayed for each zone. The amount of aggregate can be kept somewhat uniform, and uniform peeling effect can be obtained over the entire cylinder section.

The step-down structure of the space 22 can increase the quality of the final discharged aggregate by providing more peeling opportunities by relatively increasing the aggregate lag time of the oversize standard which is more likely to be covered with mortar, and screening separately. It is possible to obtain a particle size that meets the quality of recycled aggregates without the need for installing post-stage equipment.

The stirrer 40 according to the present invention functions to agitate aggregates and provide flow to shake off and peel off mortar buried on the aggregate surface by friction between aggregates and contact pressure between the cylinder and the stirrer.

The stirrer 40 has a structure in which the stirring blades 42 are formed at regular intervals on the central axis 41, and the stirring blades 42 are integrally formed with the central axis 41. ) And a blade 422 coupled to the arm 421 in a fastening structure.

The blade is fastened to the arm by fastening so that it is easy to replace when worn.

The stirrer drive 43 is connected to the central shaft 41 by suitable transmission means.

The stirrer and the cylinder can improve the peeling effect by changing the rotation direction. That is, because the direction of rotation is different, aggregates are dispersed without being aggregated and moved, and the collision chance between the aggregates is increased, so that efficient peeling is performed, and separation and release of the peeling mortar is effectively performed.
In addition, the stirring blade 42 of the stirrer is formed so that the end thereof is close to the cylinder to stir the input aggregate deeply and stir, forming a stirring blade only in the cylindrical body portion to be described later and the stirring blade in the cylindrical screen portion 25 By omitting the mortar peeling in the cylindrical portion and the cylindrical screen portion is configured to achieve the improvement of the shape and fine powder.

The cylinder 20 applied in the present invention comprises a cylindrical body portion 24 having a length of 2/3 or more in the first half and a cylindrical screen portion 25 having a length of 1/3 or less in the second half.

In addition, the cylindrical body portion is coupled to the outer frame 26 so that the arc-shaped board 241 divided into three to four circumferential shape is formed in the longitudinal direction of the cylinder, and the spring unit 271 in the space portion 242 A fine powder discharge device 27 comprising a screen board 272 supported by a) and a protrusion bar 273 formed to protrude to the inside of one cylinder thereof, and vibrating according to the load change so that the fine powder generated in the peeling process is cylindrical. It has a structure to discharge to the outside.

Cylindrical body portion 24 by the above structure is divided into three to four circular arc-shaped board 241 is formed so as to form a constant space in the longitudinal direction of the cylinder is distinguished from the cylinder of the general blocked structure, the fine powder in the above space The discharge device 27 is combined to provide the effect of separating particulate mortar or fine powder, which is a peeling material, from the aggregate during peeling.

The spring unit 271 constituting the differential discharge device 27 is composed of a compression coil spring 271a, a bolt 271b, a washer 271c, a nut 271d and a expansion joint plate 271e, and a differential discharge device The assembly of (27) is made by fitting the expansion joint plate (271e) so as to be in contact with the cylinder of the space, and assembling with the washer and bolt nut in the order of the screen board (272), the compression coil spring (271a).

The expansion joint plate 271e is to prevent the effective aggregate from being discharged into the gap between the screen board and the cylinder while the spring is compressed.The elastic joint plate 271e is assembled by bending the rubber plate in a U shape and attaching the upper and lower parts to the cylinder and the screen board, respectively. can do.

The screen board 272 drills a hole for discharging the fine powder on the flat plate and then processes it into an arc shape or uses the flat plate. The screen board 272 is installed in the space of the cylinder to select and discharge only the fine particles.

The protruding bar 273 is formed by protruding the cylindrical longitudinal reinforcing frame, which is integral with the outer frame, to the inside of the cylinder. It collects and acts to be accommodated in the differential discharge device 27, for this purpose is formed at the end of the space portion in consideration of the rotation direction of the cylinder.

The differential discharge device is a mechanism that maximizes the screening effect by the screen by inducing continuous vibration by the load fluctuation applied to the spring unit according to the continuous state change of the aggregate by the rotation of the cylinder and the stirrer .

The motion mechanism of the differential discharge device can be largely divided into a position at the top and a position at the bottom of the rotating cylinder.

When the differential discharge device is located in the upper part, the aggregate load is completely eliminated due to the characteristics of the rotating cylinder, and thus the compression coil spring is maintained to the maximum state because there is no load fluctuation. When the fine discharge device is located at the bottom, numerous factors such as the rotation of the cylinder, the rotation of the agitator, and the change of the position of the fine discharge device interact with the aggregate load, causing continuous load fluctuations. Increases the screening effect by vibrating the screen board by repeating contraction and restoration in response to load changes.

Therefore, the fine particles such as mortar are separated and discharged by screening when the fine discharge device is located in the lower part, and the floating mechanism of the fine particle discharged by the suction by the dust collector is continuously performed. will be.

Separation and discharge of the granulated particles such as mortar and the fine powder by the action of the above-mentioned fine discharge device and the dust collector provides an effect of peeling off the aggregate and improving the physical performance of the recycled aggregate.

That is, fine particles such as mortar and fine particles such as cement and clay generated during the peeling process may cause lubrication between aggregates, thereby reducing the peeling effect and increasing the peeling load. The dust collector can enhance the peeling effect by removing it at the same time, and can improve the absolute dry density, absorption rate, wear loss, performance rate, alkali aggregate reaction, safety, etc., which are physical performance standards of the circulating aggregate.

In the present invention, the cylindrical screen portion 25 constituting the second half of the cylinder is formed by forming a screen hole on the cylinder, and is configured at the rear end of the cylinder to separate grain particles such as mortar, which reduces the quality of aggregate, and at the same time a dust collector ( 50) By removing the suspended dust in the final stage by the action of 50), it is possible to separate and remove the fine material of 0.08MM or less without being washed by water.

The cylindrical screen portion 25 constitutes an independent space inside the cylinder by the front and rear fixed disks, and removes the stirring blades of the stirrer, and the baling action by the rotation of the cylindrical protrusion 23 formed on the cylindrical screen and the cylinder. By dispersing the aggregates by separating the fine particles from the aggregates, and then by the dust-collecting action by the dust collector, the fine particles contained in the aggregates can be efficiently removed without washing by water.

The cylindrical screen may be of a fixed type fixed by the outer frame, it may be of a vibration type coupled by the shock absorbing device (28).

7 and 8 illustrate another embodiment of the cylindrical screen unit to which the shock absorbing device 28 is applied. In the configuration of the cylindrical screen unit 25, an arc-shaped screen board 251 having 3 to 4 cylindrical screens is provided. The T-angle bar 281 is configured as a frame so that the tip protrudes into the screen board in the longitudinal direction between the divided arc-shaped screen boards 251. 282 is applied to the shock absorbing device 28 of the structure coupled to the cylindrical body portion 24 and the T-angle bar 281.

The spring unit 282 is composed of a compression coil spring 282a, a bolt 282b, a washer 282c, a nut 282d and an expansion joint plate 282e, the assembly of the shock absorbing device 28 is T The screen board 251 is disposed between the angle bars 281, and then the bolts 282b, the washers 282c, and the nuts 282d are assembled so that the compression coil spring 282a is positioned outside the screen board. The expansion joint plate 282e is attached to the contact portion of the board 251 and the T angle bar 281 and the screen board 251 and the cylindrical body 24 to prevent the gap.

The arc-shaped screen board 251 constitutes a cylindrical screen by assembly, but is not fixed by being supported by the spring unit 282 and vibrates, and effectively absorbs the drop impact of the aggregate, thereby damaging the screen board 251. prevent.

The size of the screen hole in the screen is determined by the size of the passing particles. The screen hole size for the purpose of differentiating discharge is composed of about 5MM. In this case, in order to facilitate screening, the proper thickness of the screen board is about 5MM. Repeated contact and impact by the aggregates, however, significantly reduces the endurance life of screen boards around 5MM thick.

The shock absorbing device 28 applied in the present invention effectively absorbs the impact applied from the aggregate by the shock absorbing action of the spring unit 282, thereby providing an effect of improving the durability life of the thin screen board, and to some extent. Even though the thickness is increased, it provides the advantage of maintaining the screening effect by preventing the blockage by vibration, and by effectively shaking off the fine particles in the aggregate by vibration to make the floating state to enhance the dust collection effect by the dust collector Do it.

9A and 9B illustrate an operating state of the present invention based on a basic structure, in which an aggregate is crushed to a predetermined standard by an intermediate treatment process, and foreign matter is removed to have an aggregate having a certain quality level as seen by a conveying means such as a conveyor. Injected into the peeler according to the invention, the input aggregate is introduced into the cylindrical body portion and sequentially passed through the delay board consisting of three stages, and then transferred to the cylindrical screen portion, which is the final stage, and discharged through the space of the fixed disk formed at the end of the cylindrical screen portion. The stripping process according to the present invention is carried out in the process of discharged into the chute.

In the cylindrical part, the friction between aggregates is induced by the action of the cylinder and the stirrer, and the repetitive stirring pressure is applied to separate the mortar attached to the surface of the aggregate. By the vibration of the fine discharge device, the granulated particles pass through the screen and are discharged to the lower part of the cylinder and are discharged to the outside by a separate discharge device, and the dust scattered during the grinding and collision process is moved to the upper side of the cylinder by the suction pressure of the dust collector. Emissions are removed.

The cylindrical screen part of the final stage separates the mortar granules contained in the final aggregate by the pure screening action and discharges them to the bottom, and the fine dust contained between the aggregates is lifted and sucked and separated by the collecting device continuously.

The present invention provides the effect of separating the separation effect of the aggregate and the improvement of the shape of the aggregate and the deterioration factors such as mortar from the aggregate by the above action, and the removal of fine dust, which was possible by the conventional water washing, by a single device. will be.

10: mainframe
11: cover 12: hopper
20: cylinder
21: drive device 211: roller 212: electric motor 213: chain 22: space
23: corrugated protrusion 24: cylindrical body portion
241: arc board 242: space portion 243: liner
25: cylindrical screen portion
251: screen board
26: outer frame
27: differential discharge device
271: spring unit 271a: spring 271b: bolt 271c: washer
271d: nut 271e: expansion joint
272: screenboard 273: protrusion bar
28: shock absorber
281: T angle bar 282: Spring unit 282a: Compression coil spring
282b: bolt 282c: washer 282d: nut 282e: expansion joint plate
30: delay board
31: fixed disc 311: rubber protective plate 32: bracket
40: stirrer
41: central axis 42: stirring blade
421: arm 422: blade
43: drive unit
50: dust collector
60: discharge chute

Claims (2)

A main frame 10 composed of a rectangular frame body; A cylinder (20) provided with a constant gradient on the main frame (10) to be rotated by the driving device (21) and having a corrugated protrusion (23) for frictional contact with the aggregate on an inner surface thereof; The inner surface of the cylinder 20 and the space 22 of constant intervals are maintained and consists of a plurality of stationary disks 31 which are arranged and fixed to the cylinder to have a predetermined distance along the longitudinal direction of the cylinder, the stationary disk is a cylinder A multiple delay board 30 for dividing and dividing the inside of the cylinder so that the space 22 between the cylinder and the fixed disk is gradually reduced by increasing the outer diameter step by step from the input side to the discharge side; The central shaft 41 penetrates through the center of the stationary disk 31 of the delay board 30, and both ends thereof are rotated on the main frame, and stirring blades 42 are installed at regular intervals on the central shaft. A stirrer 40 configured to rotate inside the cylinder by a drive device 43 connected to the head 41). In the circulating aggregate peeling device for concrete using a multi-delay board configured to be peeled while passing,
The cylinder 20 is composed of a cylindrical portion 24 having a length of 2/3 or more in the first half and a cylindrical screen portion 25 having a length of 1/3 or less in the second half, and the cylindrical portion is divided into three to four cylindrical portions. The circular arc board 241 is coupled to the outer frame 26 so that a predetermined space is formed in the longitudinal direction of the cylinder, and the space portion 242 is supported by the screen unit 272 and the cylinder on one side thereof by the spring unit 271. It is made of a structure for discharging the fine powder generated in the peeling process to the outside of the cylinder by installing a fine powder discharge device 27 consisting of a protrusion bar 273 protruding to the inside of the vibration by vibrating according to the load change,
The stirring blade 42 of the stirrer 40 is formed only in the cylindrical body 24 so that the end thereof is close to the cylinder, and each stationary disk 31 constituting the multiple delay board 30 is formed in the cylinder. Is fixed by the bracket (32),
A cover 11 is installed to surround an upper portion of the cylinder 20, and a dust suction port 51 connected to the dust collector 50 is installed inside the cover.
The shock absorbing device 28 is coupled to the cylindrical screen portion 25, the shock absorbing device 28 is divided into an arc-shaped screen board 251 consisting of three to four cylindrical screen, divided arc-shaped Between the screen board 251, the T-angle bar 281 is configured as a frame such that the tip thereof protrudes into the screen board in the longitudinal direction, and each arc-shaped screen board 251 is formed using a cylindrical unit 24 using a spring unit 282. ) And circulating aggregate peeling device for concrete using a multi-delay board, characterized in that consisting of a structure coupled to the T angle bar (281). delete

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