KR20160035512A - Classifier for aggregate - Google Patents

Abstract

The present invention relates to a classifier for dry sand, and more particularly, to a classifier for a dry sand, which comprises a main duct for guiding sand introduced into an upper portion downward; A plurality of air inflow ducts connected to the main ducts such that end portions thereof are connected to the main ducts so as to be air-circulated; A dust duct connected to the main duct at one end thereof for air circulation and having a dust collector at the other end thereof for discharging fine particles separated from the sand together with air in the main duct; And one end of the air duct faces the one end of the air duct, and the other end of the air duct faces the end of the air inlet duct, A vortex forming unit in which a vortex is formed so as to face the dust-collecting duct; And a classifying and regulating means provided to be capable of opening and closing a part of the vortex forming portion and controlling an air flow rate to the outside.
According to such a configuration, selective opening and closing operation of the duct for introducing air into the main duct enables selective selection of the differential having different particle sizes, thereby reducing the plant installation cost due to the classifier installation, It is possible to actively cope with the demand of sand through the use of the sand filter and the sand input section to be supplied to the classifier is formed long so as to disperse the sand so that the differentials of the sand are prevented from sticking to each other, have.

Description

Classifier for aggregate

The present invention relates to a classifier for dry sand, and more particularly, to a classifier for selecting fine particles having different particle sizes, in which an integrated structure is provided to reduce plant installation costs, actively cope with aggregate demand, The present invention relates to a classifier for dry sand.

The materials used in civil engineering and construction work such as lecturers and maritime could be indiscriminately picked up due to the revitalization of the construction industry in the early days. However, due to the damage and destruction of the ecosystem in recent years, the amount of collected materials is extremely limited.

Recently, in order to solve the scarcity of soil and aggregate, recycled soil (recycling) and aggregate are being produced by producing artificial soil from mountainous areas or using waste concrete through construction waste.

In other words, many bridges, roads, and various buildings that have arisen during the process of urbanization and industrialization gradually become old as time goes by, and many construction wastes are generated in the process of demolition, reconstruction and redevelopment of these old structures.

Such construction waste is usually produced by crushing, crushing and discharging the foreign matter, and then divided into soil and aggregate.

On the other hand, in order to produce fine sand used as a raw material of mortar and cement, a classifier is used to classify the fine aggregate which is firstly sorted, that is, sand, by the particle size.

That is, generally, a classifier having different structures to remove 0.30 mm to 1.5 mm of fine powder and 0.063 mm to 0.30 mm of ultrafine powder from sand is used, and depending on the use of the sand, It is often necessary to be at the same time.

Therefore, it is preferable that both types of classifiers are used when fine aggregate, i.e., sand is sorted, but there is a problem in that the facility cost is increased and the economical efficiency is remarkably lowered to reinstall the entire plant facility.

On the other hand, prior to classifying the fine aggregate by the classifier, the aggregate may be injected into the vibrating screen to select the fine aggregate. That is, the aggregate that has undergone crushing and primary screening is conveyed through the conveyor belt and immediately put into the vibration screen to perform screening.

The aggregate introduced by this method does not spread evenly on the vibrating screen, thereby blocking the space of the screening screen and causing the screening efficiency to deteriorate.

In addition, the fine aggregate generally contains a certain amount of moisture, and when it falls down intensively in one place, the differentiates cling to each other to form a lump, thereby blocking the hole and obstructing the selection. As a result, there is a problem in that the aggregate that can be produced as a product and capable of producing a high added value is classified as a low grade mixed stone, thereby deteriorating the profitability.

KR 10-0523520 B KR 10-2006-0085438 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to provide a classifier for sorting different kinds of fine particles with a single structure to reduce plant installation cost, Classifier.

It is another object of the present invention to provide a classifier for a dry sand in which a predetermined amount of sand is uniformly injected into a classifier by forming a long length of a sand input section into a classifier.

According to an aspect of the present invention, there is provided a sewing machine comprising: a main duct for guiding sand inserted into an upper portion downward; A plurality of air inflow ducts connected to the main ducts such that end portions thereof are connected to the main ducts so as to be air-circulated; A dust duct connected to the main duct at one end thereof for air circulation and having a dust collector at the other end thereof for discharging fine particles separated from the sand together with air in the main duct; And one end of the air duct faces the one end of the air duct, and the other end of the air duct faces the end of the air inlet duct, A vortex forming unit in which a vortex is formed so as to face the dust-collecting duct; And a classifying and regulating means provided to be capable of opening and closing a part of the vortex forming portion and controlling an air flow rate to the outside.

The air inlet duct includes a first inlet duct connected to an upper end of the main duct; And a second inlet duct connected to a lower end of the main duct, wherein an end of the second inlet duct is provided at a lower portion of the dust collecting duct to face the vortex forming portion, A control valve is provided so as to be openable and closable to regulate an air flow rate of the first inlet duct and a second control valve to open and close the second inlet duct to control the air flow rate of the second inlet duct.

The first guide is fixed to the inside of the main duct facing the end of the first inlet duct in a downwardly sloping shape so that the sand separated from the upper surface of the first guide drops toward the second inlet duct.

The second guide is fixed to the inside of the main duct facing the lower end of the dust collecting duct in an inclined downward direction so that the sand falling on the upper surface of the second guide drops downward.

Wherein the classification adjusting means is provided with a classifying opening so that a part of the other side of the vortex forming portion can be opened and closed; One end of the classifying control door is hinged to the vortex forming part and the other end can be opened and closed while rotating around the one end.

A vortex increasing unit may be provided at an end of the dust collecting duct to increase the amount of air sucked in the upper portion of the dust collecting duct so as to increase vortex.

A bypass duct is branched and provided at an upper end of the main duct; A direction adjusting lever is provided to selectively open and close the upper space of the main duct and the bypass duct so that the sand falling from the upper portion of the main duct can be selectively supplied to the main duct and the bypass duct according to the operation of the direction adjusting lever.

A sand loading device may be further installed in the upper portion of the main duct to transfer the sand by vibration and to inject sand into the upper portion of the main duct.

The sand inlet device comprises: a vibration supply plate provided on an upper portion of the main duct and supplied with sand on an upper surface thereof and having a gradually narrower width from one end to the other end; And vibration means for generating vibration in the vibration supply plate to transfer the sand supplied to the vibration supply plate from one end to the other end by vibration to drop sand from the vibration supply plate to the upper portion of the main duct .

A supply line may be formed in a shape cut in an oblique direction with respect to the entire other end front surface of the vibration supply plate.

According to the present invention, the selective opening / closing operation of the duct for introducing the air into the main duct enables selective selection of the differential having different particle sizes, so that the plant installation cost And it is possible to actively cope with the demand for sand through a classifier.

In addition, when the sand is subjected to a large amount of moisture and moisture, sand is supplied by bypass to the side of the bypass duct by the operation of the direction control lever, so that dry sand through the classifier can be selectively treated.

In addition, by forming the sand input section to be long in the classifier and injecting a predetermined amount of sand evenly into the classifier, it is possible to prevent the differentials of the sand from sticking to each other, thereby improving the sand selection efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the entire configuration of a sand classifier according to the present invention. Fig.
Fig. 2 is a side view of Fig. 1; Fig.
FIG. 3 is a plan view of the sand supply device above the sand classifier shown in FIG. 1; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The dry sand classifier according to the present invention mainly comprises a main duct 100, an air inflow duct, a dust collecting duct 300, a vortex forming unit 400, and a classification adjusting unit.

Referring to FIGS. 1 to 3, the main duct 100 guides the sand introduced into the upper portion downward by gravity, and is formed long in the vertical direction.

In the main duct 100, a hopper 110 is provided at the uppermost stage, sand is introduced through the hopper 110, and a vortex forming part 400, which will be described later, protrudes outward at a lower end.

In addition, the plurality of air inlet ducts are connected to the main duct 100 at the ends thereof, so that the air is circulated and the air flow rate can be adjusted.

For example, the air inlet duct may include a first inlet duct 210 and a second inlet duct 220.

Specifically, the first inlet duct 210 is connected to the upper end of the main duct 100 located at the lower end of the hopper 110, and the other end of the first inlet duct 210 may be downwardly inclined from one side. have.

A first control valve 215 may be provided in the first inlet duct 210 so that the amount of air flowing through the first inlet duct 210 can be adjusted. The valve 215 is capable of adjusting the air flow rate through the rotation operation of the opening / closing plate installed in the first inlet duct 210.

The second inlet duct 220 is connected to the lower end of the main duct 100 located at the lower end of the dust collecting duct 300 and the other end of the second inlet duct 220 is sloped upward .

A second control valve 225 may be provided in the second inlet duct 220 so that the amount of air flowing through the second inlet duct 220 may be adjusted. The valve 225 is capable of adjusting the air flow rate through the rotation operation of the opening / closing plate installed in the second inlet duct 220.

In addition, the end of the second inflow duct 220 may be configured to face the vortex forming part 400.

That is, when the dust collector 310 (not shown) operates, air flows into the main duct 100 through the first inlet duct 210 and the second inlet duct 220. At this time, 215 and the second control valve 225 to regulate the amount of air flowing through the first inlet duct 210 and the second inlet duct 220.

The dust duct 300 discharges fine particles selected from the sand together with air in the main duct 100. One end of the dust duct 300 is connected to the main duct 100 to be air- A dust collector 310 is connected to an end of the main duct 100 to suck and discharge air and fine particles in the main duct 100 through the operation of the dust collector 310. [

The dust-collecting duct 300 may be disposed at the upper end of the second inlet duct 220 and may be disposed to face the vortex forming unit 400.

Specifically, the vortex forming part 400 is protruded outwardly so as to have an arc-shaped space on a lower side surface of the main duct 100. One end of the vortex forming part 400 faces the one end of the dust collecting duct 300 and the other end of the vortex forming part 400 faces the end of the second inflow duct 220. do.

The air and the fine particles at the upper end of the vortex forming part 400 are introduced into the dust collecting duct 300 by the air suction force of the dust collecting duct 300 and the air at the lower end of the vortex forming part 400 And the fine particles flow along the side surface of the vortex forming part 400 together with the air flowing through the second inflow duct 220 to form a vortex. Accordingly, the fine powder is separated from the sand falling between the vortex forming part 400 and the dust collecting mat, and the separated fine powder is discharged to the outside through the dust collecting duct 300 by the vortex formed in the vortex forming part 400.

In addition, a vortex augmenting unit may be provided at an end of the dust-collecting duct 300 to increase the amount of air sucked in the upper portion of the dust-collecting duct 300, rather than the amount of air sucked under the dust-collecting duct 300.

For example, a plurality of blades 320 are provided at the ends of the dust-collecting duct 300 in the vertical direction. The blades 320 are provided at different angles from the dust-collecting duct 300 to the dust-collecting duct 300 And the flow rate of the air gradually increases toward the lower portion of the air flow direction.

That is, the horizontal plane angle formed by the blade 320 on the dust collecting duct 300 is smaller than the horizontal plane angle formed by the blade 320 under the dust collecting duct 300 with respect to the air flowing direction passing through the end portion of the dust collecting duct 300 The amount of air discharged through the upper portion of the dust-collecting duct 300 is further increased, and the vortex is further increased.

Subsequently, the classification adjusting means is provided to be able to open and close part of the vortex forming part 400, and it is possible to control the air flow rate to the outside.

For example, the classifying control door 410 is provided so that a part of the other side of the vortex forming part 400 can be opened and closed. One end of the classifying control door 410 is hinged to the vortex forming part 400 and the other end is rotatable around one end so that the classifying control door 410 rotates about the hinge at one end Can be opened and closed.

A first guide 120 is fixed to the inside of the main duct 100 facing the end of the first inlet duct 210 in a downward sloping shape so as to sand the upper surface of the first guide 120 The first inlet duct 220 and the second inlet duct 220 are connected to each other.

For example, one end of the first guide 120 is fixed to the inner surface of the main duct 100, and the other end of the first guide 120 is inclined downward from one end of the first guide 120, The sand can fall down from the other end of the first guide 120 to the bottom.

A second guide 130 is fixed to the inside of the main duct 100 facing the lower end of the dust collecting duct 300 in an inclined downward direction so that the sand dropped on the upper surface of the second guide 130 Lt; / RTI >

For example, one end of the second guide 130 is fixed to the lower end of the dust collecting duct 300, and the other end of the second guide 130 is inclined downward from one end of the second guide 130, So that the second guide 130 can be lowered from the other end.

Particularly, since the sand is dropped on the upper surface of the second guide 130 at the entrance of the dust-collecting duct 300 and then dropped down, the fine particles separated from the sand are more smoothly discharged through the dust-collecting duct 300.

In addition, the sand classified in the dust collecting duct 300 is dropped to the lower portion of the main duct 100. In the lower portion of the main duct 100, The conveying belt 600 is disposed close to the main duct 100 so that the amount of air flowing into the main duct 100 through the opened portion of the main duct 100 is reduced as much as possible.

A bypass duct 140 is provided at an upper end of the main duct 100 and a direction adjusting lever 150 is provided to selectively open and close an upper space of the main duct 100 and the bypass duct 140 So that the sand falling from the upper portion of the main duct 100 is selectively supplied to the main duct 100 and the bypass duct 140 according to the operation of the direction control lever 150.

That is, when there is much moisture and moisture in the sand, as in the case of rainy weather, the sand is supplied by bypass to the bypass duct 140 by the operation of the direction control lever 150, so that dry sand selection through the classifier is not performed .

Meanwhile, the sand duct 500 may further be installed on the upper portion of the main duct 100 to transfer the sand by vibration and inject sand into the upper portion of the main duct 100.

Specifically, the sand throwing apparatus 500 includes a vibration supply plate 510 provided on the upper portion of the main duct 100 and supplied with sand on the upper surface thereof and having a gradually narrower width from one end to the other end, The vibration supplied to the vibration supply plate 510 is transferred from the vibration supply plate 510 to the upper end of the main duct 100 by vibrating the sand supplied to the vibration supply plate 510, And vibration means for dropping the sand.

For example, the other end of the vibration supply plate 510 is formed with a supply line 515 cut in a diagonal direction with respect to the entire surface thereof, so that the length of the sand supply line 515 falling from the vibration supply plate 510 Is formed as long as possible. The length of the supply line 515 is longer than the length of the hopper 110 provided in the upper portion of the main duct 100 so that the sand falling along the supply line 515 is supplied to the hopper 110, respectively.

The vibrating means includes a vibrating motor 530 that is fixed to both sides of the vibration supply plate 510 and a vibration motor 530 that vibrates due to eccentric rotation of the support frame 520, A spring 540 is fixed to the lower end of the support frame 520 to absorb the vibration generated by the vibration motor 530 while supporting the support frame 520. At this time, the spring 540 may be fixed to a frame structure provided outside the aggregate classifier to fix the sand classifier of the present invention.

That is, when the vibration supply plate 510 is viewed from above, the edge of the other end of the vibration supply plate 510 is formed in a shape obliquely cut, so that the length of the vibration supply plate 510 As a result, the sand can be dispersed evenly without being concentrated in one place. As a result, it is possible to prevent aggregation of fine particles and improve the sand sorting efficiency.

Hereinafter, an example for sorting the differentiations by the particle size of the fine particles using the sand classifier of the present invention will be described.

The first control valve 215 and the second control valve 225 are used to remove the first inlet duct 210 and the second inlet duct 220 from the first inlet duct 210 and the second inlet duct 220, And closes the classifying control door 410 to operate the dust collector 310. At this time, the first inflow duct 210 may be configured to inflow a predetermined amount of air without completely closing the first inflow duct 210 as occasion demands.

Air is introduced into the main duct 100 through the classifying door 410 so that fine particles of 0.30 mm to 1.5 mm are discharged together with the air inside the main duct 100 by the dust collecting duct 300 .

In order to remove superfine fractions of 0.063 mm to 0.30 mm from the dripping water, the first inlet duct 210 and the second inlet duct 220 are opened and the classification control door 410 is closed, 310).

Air flows into the main duct 100 through the first inlet duct 210 and the second inlet duct 220 and flows through the air in the second inlet duct 220 and the dust collecting duct 300, A vortex is generated in the vortex generating unit by the flow direction and the micro-vents of 0.063 mm to 0.30 mm together with the air inside the main duct 100 can be discharged through the dust-collecting duct 300.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the specific embodiments set forth herein; rather, .

100: Main duct 110: Hopper
120: first guide 130: second guide
140: Bypass duct 150: Directional control lever
210: first inlet duct 215: first control valve
220: second inlet duct 225: second control valve
300: Dust duct 310: Dust collector
320: blade 400: vortex forming part
410: Classification control door 500: Sand input device
510: vibration supply plate 515: supply line
520: Support frame 530: Vibration motor
540: Spring 600: Conveyor belt

Claims (10)

A main duct (100) for guiding the sand introduced into the upper portion to fall downward;
A plurality of air inflow ducts connected to the main duct 100 so that the ends thereof are air circulated and the air circulation amount can be adjusted;
A duct 300 connected to the main duct 100 at one end thereof and having a dust collector 310 installed at the other end thereof for discharging fine particles selected from the sand together with air inside the main duct 100;
One end portion of the dust collecting duct faces the one end of the air inlet duct and the other end of the dust collecting duct 310 faces the other end of the air inlet duct, A vortex forming part 400 in which a vortex is formed so as to face the dust-collecting duct 300 in the space in operation; And
And classifying and regulating means provided on the part of the vortex forming part so as to be able to open and close and to control an air flow rate to the outside. The method according to claim 1,
The air inlet duct
A first inlet duct 210 connected to an upper end of the main duct 100;
And a second inflow duct 220 connected to a lower end of the main duct 100,
An end of the second inflow duct 220 is provided at a lower portion of the dust collecting duct 300 to face the vortex forming part 400,
A first control valve 215 is provided in the first inlet duct 210 so as to open and close the first inlet duct 210 to adjust the air flow rate of the first inlet duct 210,
Wherein a second control valve (225) is provided in the second inlet duct (220) so as to open and close the second inlet valve (220) to adjust an air flow rate of the second inlet duct (220). 3. The method of claim 2,
A first guide 120 is fixed to the inside of the main duct 100 facing the end of the first inlet duct 210 in a downwardly sloping shape so that the sand separated from the upper surface of the first guide 120 2 inlet duct (220) side. 3. The method of claim 2,
The second guide 130 is fixed to the inside of the main duct 100 facing the lower end of the dust collecting duct 300 in an inclined downward direction so that the sand falling on the upper surface of the second guide 130 falls down And a plurality of dry sand mills. The method according to claim 1,
The classifying and adjusting means includes:
A classifying control door 410 is provided so that a part of the other side of the vortex forming part 400 can be opened and closed;
Wherein one end of the classifying door (410) is hinged to the vortex forming part (400), and the other end is opened and closed while rotating around one end. The method according to claim 1,
Wherein a vortex increasing means is provided at an end of the dust-collecting duct 300 to increase the amount of air sucked in the upper portion of the dust-collecting duct 300 than the amount of air sucked under the dust-collecting duct 300, . The method according to claim 1,
A bypass duct 140 is branched and provided at an upper end of the main duct 100;
A direction adjusting lever 150 is provided to selectively open and close an upper space of the main duct 100 and the bypass duct 140 so that the main duct 100 is separated from the upper portion of the main duct 100 according to the operation of the direction adjusting lever 150. [ Wherein the sand is selectively supplied to the main duct (100) and the bypass duct (140). The method according to claim 1,
Wherein the main duct (100) is further provided with a sand loading device (500) for transferring the sand by vibration and injecting sand into the upper part of the main duct (100). 9. The method of claim 8,
The sand throwing apparatus 500 includes:
A vibration supply plate 510 which is provided on the upper portion of the main duct 100 and is supplied with sand on the upper surface thereof and whose width gradually decreases from one end to the other end;
The vibration supplied to the vibration supply plate 510 is transferred from the vibration supply plate 510 to the upper end of the main duct 100 by vibrating the sand supplied to the vibration supply plate 510, And a vibration means for dropping the sand. 10. The method of claim 9,
And a supply line (515) is formed in a shape cut in an oblique direction with respect to the entire other end front surface of the vibration supply plate (510).

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