KR101199631B1 - Mortar exfoliation device for recycled aggregates - Google Patents

Abstract

PURPOSE: A recycled aggregate exfoliation device for concrete using shock-absorbing screen board is provided to enhance durability of the aggregate. CONSTITUTION: A recycled aggregate exfoliation device for concrete using shock-absorbing screen board comprises a cylindrical housing(10), a cylindrical screen(20), a stirrer(30), and a discharge unit(40). The cylindrical screen is rotatably installed inside the housing. The stirrer passes through the central part of the cylindrical screen. The discharge unit discharges the milled fiber which is separated by the cylindrical screen. The cylindrical screen is composed of shock absorption type screen board. Circular arc shaped screen boards(21) are horizontally assembled based on a cylindrical screen frame by using a spring unit(22). A protruding bar(24) is formed between the screen boards in the longitudinal direction.

Description

Circulation aggregate peeling device for concrete using impact-absorbing screen board {Mortar Exfoliation Device for Recycled Aggregates}

The present invention relates to a concrete aggregate aggregate peeling device for separating and removing the mortar contained in the aggregate in order to meet the concrete aggregate quality standards for concrete, in particular peeling of the mortar is made while preventing the fracture of the raw aggregate, peeling mortar The present invention relates to a circulating aggregate peeling device for concrete using an impact-absorbing screen board which improves peeling efficiency by separating sieving at the same time of peeling.

Waste concrete generated during the demolition of the structure is recycled to recycled aggregate through an intermediate treatment process.

Intermediate treatment of waste cones includes a crushing process that uses a plurality of crushers with various crushing crushers to crush the aggregate size for recycling. It consists of a series of continuous processes, such as a separation process for separating and reinforcing reinforcing bars and foreign substances using magnetic force and manpower, and a separation process for separating particles into particle sizes using recycling screens.

The recycled aggregate obtained by the conventional intermediate treatment process satisfies the quality technology of the recycled aggregate for the road auxiliary layer, but the produced aggregate has a mortar coated on a part of the raw aggregate, and a small amount of clay is contained. Because of this, the use of more advanced recycled aggregates for concrete recycled aggregates is limited.

Mortar adhering to raw aggregates increases the absorption of aggregates and causes alkaline aggregate reactions.

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.

Clay contained in recycled aggregates reduces the adhesion between cement paste and rebar, affecting the strength and stability of concrete.

Therefore, in order to use the recycled aggregate for concrete use, it is necessary to remove and remove the mortar contained in the raw aggregate and the separation and removal of the clay component, and peeling apparatuses using various methods have been proposed through the technology development efforts.

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.

Such a conventional peeling device mainly provides an effective technical means for peeling mortar by injecting a collision between the aggregate and the housing and a collision between the aggregates by hitting, and by shaking off the mortar attached to the raw aggregate. At least three times, the crushed raw aggregate is exposed to fatigue, and the impact is exerted more than necessary during the peeling process, causing cracks on the raw aggregate and breaking it into angular and angular shapes. There was a problem of lowering.

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.

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

The present invention is self-adjusted so that the impact on the raw aggregates is not excessively improved while the peeling of the mortar is effectively carried out to provide a peeling device of the structure that can prevent the cracks and cracks of the raw aggregates to improve the durability of the aggregates, It has a purpose to improve.

In addition, the present invention provides a peeling device for separating and removing the mortar from the aggregate and at the same time to remove the mortar from the aggregate to improve the peeling device efficiency, and to perform the process by separating and removing fine powder at the same time The purpose is to save time and facilities.

The present invention presented for this purpose, by introducing the recycled aggregates produced by the intermediate treatment process of the waste concrete, and selected by size to provide the recycled aggregates for concrete to produce the recycled aggregates for concrete, by the housing frame A cylindrical housing supported; A cylindrical screen installed in the housing and rotatably installed by a driving device; An agitator installed in the cylindrical screen to penetrate the center portion of the cylindrical screen and installed to rotate by a driving device; And a discharge device for discharging the fine powder separated by the cylindrical screen, which is installed at the lower part of the housing, wherein the cylindrical screen is formed by assembling the circular screen board vertically and horizontally with respect to the cylindrical screen frame using a spring unit. A shock-absorbing screen board, and a protrusion bar formed to protrude between the screen boards in the longitudinal direction of the cylindrical screen; The stirrer comprises a structure in which stirring blades are formed at regular intervals on a central axis; and the cylindrical screen and the stirrer are rotated in opposite directions to agitate aggregate aggregated to peel off the mortar of the aggregate surface, and the separated fine powder is screened. It is characterized in that it is configured to separate and discharge through the hole.

In addition, the present invention is a mixer is coupled to the inlet side of the housing, the mixer is open at the top and the lower part constitutes a semi-cylinder, the semi-cylinder inner surface of the mixer housing is formed with a corrugated protrusion, half of the mixer housing Separation device is provided in the semi-cylinder to penetrate the center of the cylinder and is equipped with a stirrer installed to rotate by the drive device through the inlet of the housing in the state of primary grinding by stirring the raw material introduced through the upper opening of the housing It characterized in that the supply to.

In addition, the present invention, in the constituting the stirrer, a cylindrical reinforcing shaft to the outer side of the central axis, the stirring blade formed on the reinforcing shaft is an arm formed integrally with the reinforcing shaft and the fastening structure against the arm Composed of a blade to be coupled, the blade is characterized in that composed of a rubber material.

The present invention according to the above configuration, the aggregate injected into the cylindrical screen is scattered and priced by the stirrer, the impact force that hits the screen board, the friction between the aggregates, the drop impact of the aggregate pulled up by the protrusion bar, and the screen board The mortar is separated through a process in which mortar attached to the aggregate is separated and ground by interaction such as contact frictional force with the contact.

Aggregate that hits the screen board during the peeling process is not subjected to excessive shock by the shock absorbing action of the spring unit, and only the impact necessary for peeling the attached mortar is applied to prevent internal cracking or secondary fracture, thereby improving durability of the final aggregate. And good standing can be maintained.

In addition, the screen board is formed by a plurality of screen holes are continuously discharged mortar through the hole, the impact of the aggregate is applied to the screen board is a continuous vibration movement of the screen board is made without mortar, clay powder, etc. Semantic particles are effectively separated and removed. As a result, the post-process for separating the separated mortar from the raw aggregates such as washing or screening can be omitted, which simplifies the equipment and shortens the process, thereby reducing the cost. Since it does not, peeling efficiency improves.

In addition, by configuring the blade of the stirring blades to strike the aggregate made of a rubber material provides an advantage that can utilize the conveyor recycled rubber and the like without excessive impact on the aggregate.

In addition, by installing a mixer at the raw material input unit, it is possible to obtain the mixing and agitation effect of the aggregate before the input of the peeling device, to improve the peeling performance by the grinding effect between the corrugated protrusion and the aggregate, and to extend the time exposed to the peeling. It is possible to increase the peeling performance by providing.

1 is a basic structural diagram of the present invention
2 is a side structural view of the present invention
3 is a detailed structural diagram of the spring unit coupling portion
4 is another embodiment of the discharge device
5 is an embodiment of a blender
6a and 6b is a side structure diagram applying a mixer

1 and 2 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 recycled aggregate for concrete by inputting the sorted circulating aggregate separated by size It constitutes a circulation aggregate peeling device for the product.

The peeling apparatus includes a cylindrical housing (10) supported by the housing frame (11); A cylindrical screen 20 installed in the housing and rotatably installed by the driving device 25; An agitator (30) installed in the cylindrical screen to penetrate the center portion of the cylindrical screen and installed to rotate by a driving device; It is installed in the lower housing and comprises a discharge device 40 for discharging the fine powder separated by the cylindrical screen.

The cylindrical housing 10 blocks the scattering dust and noise by blocking the peeling environment from the inside from the outside environment, and is integrally formed in the housing frame to protect the internal components and the safety of the worker.

Aggregate input of the cylindrical housing is configured in the form of a hopper 12 is configured to be continuously supplied by the conveyor system the input aggregate produced by the intermediate process of the waste concrete to produce particles of a certain size.

The cylindrical housing may be configured in the form of a rectangular box as needed, and may be implemented in a structure that is organically coupled with a facility for safely inhaling and discharging dust generated therein in connection with the dust collecting system.

Cylindrical screen 20 according to the present invention, the screen board divided to perform the action of inducing the separation of the mortar in the contact process by the impact with the aggregate, and on the other hand to separate and discharge the separated mortar and fine particles 21 and the spring unit 22 and the protrusion bar 24 is coupled to the cylindrical screen frame 23 to form a cylindrical screen as a whole.

The arc-shaped screen board 21 is composed of three to six pieces in the circular direction of the cylindrical screen, three to five divided in the longitudinal direction, each screen board 21 has a hole for screening the mortar discharge at regular intervals The cylindrical structure is assembled in the circumferential and longitudinal directions to form an overall cylindrical screen.

The thickness of the screen can be appropriately selected in consideration of durability and abrasion, and the size of the hole can be effectively discharged fine particles such as mortar by forming below the maximum size of each specification according to fine aggregate and coarse aggregate.

The spring unit 22 is for imparting three-dimensional vibration to the screen board. As shown in FIG. 3, each spring unit has one bolt 221, a double nut 222, and a pair of washers 223. ) And a compression coil spring (224), the bolt is inserted from the inside of the screen board, the compression coil spring (224) is inserted between the screen board and the cylindrical screen frame (23) other than the cylindrical screen frame (23) It is fixed so that a constant pressing force is applied to the spring by the double nut 222 on the side, and the bolt penetrating part is formed with a little play, and the washer 223 is inserted into the friction contact part, so that the vibration of the screen board in the state of the bolt flowing. By being combined to achieve a three-dimensional vibration movement is excellent in the shock absorbing and screening screen screen.

Protruding bar 24 is configured integrally coupled to the cylindrical screen frame 23, disposed in the longitudinal direction of the cylindrical screen, protruded between the screen board and the screen board, the aggregate is stirred by the stirrer 30 screen When gathered at the bottom, the cylinder is pulled up and dropped through the rotation of the screen to induce friction between the aggregates, providing a blow opportunity by the stirrer, and applying vibration force to the screen board for smooth peeling and peeling mortar screen. It performs the action of inducing discharge through the hole.

The cylindrical screen is rotated at a low speed in the range of 10 ~ 30rpm by the drive device 25, the drive device 25 is connected by an electric motor and a chain or the roller while the cylindrical screen is supported by a roller in the housing frame Transmission of rotational drive force by direct shaft connection.

Stirrer 30 according to the present invention when the impact on the aggregate to dissipate the mortar peeling by the impact, the aggregate by the friction contact between the aggregates to maintain the gradient of the mortar peeling and cylindrical screen by the grinding action gently Perform the transfer function of aggregate in the cylindrical screen by the lead angle given to the stirring blade.

The stirrer 30 has a structure in which the stirring blades 32 are formed at regular intervals on the central axis 31, and the stirring blades 32 form a cylindrical reinforcement shaft 33 outside the central axis. The stirring blade formed on the reinforcement shaft is composed of an arm 321 integrally formed with the reinforcement shaft, and a blade 322 coupled to the arm 321 by a fastening structure. The blade is made of a rubber material. Characterized in that configured.

In addition, by arranging the blade in a spiral shape and applying a lead angle to the blade surface, aggregate transfer from the inlet to the outlet of the cylindrical screen is performed by the lid applied to the stirring blade even when the cylindrical screen is kept horizontal or given a small inclination angle.

The reinforcement shaft acts to prevent the deflection and vibration of the central axis between the jijangji and stable rotation is made, the rubber material applied to the blade serves to prevent the fracture of the aggregate when hitting the aggregate.

The blade is fastened to the arm by fastening to facilitate exchange when worn, rubber material can be recycled waste tires or conveyor belts.

The stirrer drive 34 is connected to the central shaft 31 by suitable transmission means.

The stirrer and the cylindrical screen 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.

The discharge device 40 applied in the present invention is for discharging the fine powder discharged through the screen hole to the outside of the housing, discharged by the screw 41 and discharged by the conveyor 42 as shown in FIG. It can be applied either.

5 to 6b show a structure in which the mixer 50 is installed on the aggregate input part side as another embodiment of the present invention.

 The mixer 50 has an upper portion, a lower portion forming a semi-cylinder, and a mixer housing 51 having a corrugated protrusion 511 formed on an inner surface of the semi-cylinder, and a semi-cylinder passing through the center of the semi-cylinder of the mixer housing. It has a structure including a stirrer 52 is installed and installed to rotate by the drive unit 53.

The mixer has a function of supplying the raw material introduced through the upper opening of the housing to the cylindrical screen through the inlet of the housing in the primary grinding state, and provides the mixing and stirring effect of the aggregate before injecting the peeler, Peeling performance is improved by the grinding effect between the corrugated protrusion and the aggregate, and the aggregate exposed to the peeling is extended to provide the effect of peeling a large amount of aggregate by a continuous process.

The present invention by the above configuration may include a spraying device for dust collection equipment or scattering dust in the actual operation and stabilization inside the housing, and appropriate control so that the rotational speed of the cylindrical screen and the stirrer can be changed according to the characteristics of the aggregate Means may be included.

10: housing
11: housing frame 12: hopper
20: cylindrical screen
21: screen board 22: spring unit 23: cylindrical screen frame
24: protrusion bar 25: drive device
30: stirrer
31: central axis 32: stirring blade 33: reinforcing shaft
34: drive unit
50: blender
51 housing 52 agitator 53 drive device

Claims (3)

In the present invention, a circular aggregate peeling device for producing concrete recycled aggregates is introduced by inputting recycled aggregates separated and sorted by size, which are produced by an intermediate treatment process of waste concrete, the cylindrical housing being supported by a housing frame; A cylindrical screen installed in the housing and rotatably installed by a driving device; An agitator installed in the cylindrical screen to penetrate the center portion of the cylindrical screen and installed to rotate by a driving device; And a discharge device for discharging the fine powder separated by the cylindrical screen installed at the lower part of the housing, wherein the cylindrical screen is formed by assembling the circular screen board vertically and horizontally with respect to the cylindrical screen frame using a spring unit. A shock-absorbing screen board, and a protrusion bar formed to protrude between the screen boards in the longitudinal direction of the cylindrical screen; The stirrer comprises a structure in which stirring blades are formed at regular intervals on a central axis; and the cylindrical screen and the stirrer are rotated in opposite directions to agitate the aggregated aggregate, thereby peeling off the mortar of the surface of the aggregate and removing the fine powder. Circular aggregate peeling device for concrete using a shock-absorbing screen board, characterized in that configured to separate and discharge through the hole.
The method according to claim 1,
The mixer is coupled to the inlet side of the housing, the mixer is open at the top and the lower part constitutes a semi-cylinder, the inner surface of the semi-cylinder and the corrugated projection is formed on the inner surface of the semi-cylinder, so as to penetrate the semi-cylinder center of the mixer housing It consists of a structure including a stirrer installed in the semi-cylinder and installed to rotate by the drive device to be supplied to the peeling device through the inlet of the housing in the state of primary grinding by stirring the raw material introduced through the upper opening of the housing Circulating aggregate peeling device for concrete using a shock-absorbing screen board characterized in that.
The method according to claim 1 or 2,
The stirrer forms a cylindrical reinforcement shaft outside the central axis, and the stirring blades formed on the reinforcement shaft are formed of an arm integrally formed with the reinforcement shaft, and a blade coupled to the arm by a fastening structure. Circulating aggregate peeling device for concrete using a shock-absorbing screen board, characterized in that composed of a rubber material.

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