JP2021169064A - Sieving apparatus - Google Patents

Abstract

To provide a sieving apparatus which is provided with a grizzly selection mechanism, thereby making it possible to efficiently perform sieving operation without performing selection operation in advance.SOLUTION: A sieving apparatus includes: a grizzly selection mechanism 3 which is provided on the uppermost part of a machine frame, and in which grizzly bars each have a lower end oriented in a first direction A; a vibration feeder 9 which includes a downward-inclined leading path 6 for receiving an undersize raw material from the grizzly bars, and which includes driving means for vibrating the leading path; a drum rod screen mechanism 33 which includes a drum rod screen for receiving the raw material from the leading path, installed such that an outlet is oriented in a second direction B different from the first direction, and which includes driving means for rotating the drum rod screen along the central axis of a cylinder; conveyor means 8 for conveying an undersize raw material from the drum rod screen in a third direction C different from the first and second directions; and a guide passage 10 for guiding an oversize raw material on the drum rod screen in the second direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sieving apparatus using a grizzly sorting mechanism and a drum rod screen mechanism that can be used in, for example, a limestone mine.

Conventionally, in a rotary sieving device called a so-called drum rod screen, a pair of annular frames are arranged in the front-rear direction, and each annular frame is connected by a plurality of rods through a constant opening to form a cylindrical screen. The screen is rotated around the center of the cylinder by a rotating roller, raw materials including crushed stones are charged from the front opening during rotation, sieving is performed in the rod screen, and the opening between the rods is used. The small raw material is dropped downward from the gap between the rods, and the raw material larger than the opening is discharged from the rear outlet of the cylindrical screen for sieving (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2002-11322

By the way, in the above-mentioned conventional drum rod screen, when a large crushed stone (for example, crushed stone having a particle size of 300 mm or more) is directly injected, the rod is deformed and the opening changes. In order to maintain the above, for example, only crushed stones of less than 300 mm were charged.

Raw materials such as crushed stones are charged into the drum rod screen by a heavy machine equipped with a hydraulic excavator at the site. It was necessary to perform a sorting operation, and this operation had to rely on the experienced side of the operator, which was inefficient.

The present invention has been made in view of the above-mentioned conventional problems, and by providing a grizzly sorting mechanism in front of the drum rod screen, sieving work can be efficiently performed without performing prior sorting work. It is an object of the present invention to provide a sieving apparatus capable of performing.

In order to achieve the above object, the present invention
First, it is provided at the top of the machine frame, has a plurality of downhill grizzly bars, and has a grizzly sorting mechanism in which the lower end of each grizzly bar is directed in the first direction, and is provided below the grizzly bars. A hopper that receives the raw material under the sieve of the grizzly bar, and a guide path provided in the machine frame with a downward inclination below the hopper, and the lower end of the guide path is the entrance of the drum rod screen of the next stage. A vibration feeder located in the above-mentioned machine frame, which is provided with a driving means for vibrating the guide path, and is provided on the machine frame with a downward inclination, and is installed so that the outlet faces a second direction different from the first direction. A drum rod screen mechanism having a cylindrical drum rod screen and a driving means for rotating the drum rod screen along the central axis of the cylinder, and a machine frame below the drum rod screen are provided. A conveyor means for transporting the raw material under the sieve of the drum rod screen in a third direction different from the first and second directions, and a conveyor means provided at the outlet of the drum rod screen to provide the drum rod screen. It is composed of a sieving device composed of a guide passage for guiding the raw material on the sieving in the second direction.

The machine frame includes, for example, a machine frame (2) assembled in a turret shape, for example, a horizontal upper end machine frame (2a), a horizontal intermediate machine frame (2b), an inclined machine frame (2c, 2c'), and a horizontal plate (2c, 2c'). 2d, 2d'), vertical machine frame (2e), etc. are included. The driving means for vibrating the taxiway is, for example, a driving motor (M1, M1'). The driving means for rotating the drum rod screen is, for example, a driving motor (M2, M2'). The conveyor means can be composed of, for example, a conveyor device (8) and a drive motor (M3). With this configuration, the grizzly sorting mechanism can sort, for example, a large raw material having a particle size of 300 mm or more (for example, crushed stone) and a raw material having a particle size of less than 300 mm (for example, crushed stone). It is not necessary to avoid this, and it is possible to put large crushed stones into the grizzly sorting mechanism, which enables efficient sorting. Moreover, for example, raw materials of less than 300 mm (for example, crushed stone, soil, etc.) are used with two types of raw materials (for example, crushed stone, etc.) having a particle size of less than 300 mm and a particle size of 40 mm or more, and for example, a particle size of 40 mm or less. It can be sorted into raw materials (for example, crushed stone, mud, soil, etc.), and each has three directions (large raw materials in the first direction, medium raw materials in the second direction, small raw materials in the third direction). It can be accumulated in different places.

Secondly, the machine frame is installed on a foundation structure provided on the ground, and a vertical wall is provided behind the sieving device on the side opposite to the first direction, and the vertical wall is provided. A flat surface is provided on the wall at a level higher than the ground on the side opposite to the sieving device, and the raw material can be fed into the grizzly sorting mechanism from the upper part of the grizzly sorting mechanism from the side of the flat surface. It is composed of the above-mentioned first-described sieving apparatus.

The foundation structure can be made of, for example, foundation concrete (11). With this configuration, for example, a heavy machine can be placed on a flat surface, and the raw material can be charged from the upper part of the grizzly sorting function by using a heavy machine's hydraulic excavator or the like, and a tall sieving device can be installed at the site. , It becomes possible to use it efficiently.

Thirdly, the second direction and the third direction are configured by the sieving device according to the second description, which are opposite directions to each other on the side of the sieving device with the vertical wall as a boundary.

With this configuration, when the grizzly bar of the grizzly sorting mechanism is set to the first direction, the second direction and the third direction are opposite to each other with the first direction as the center on the side of the sieving device for the vertical wall. Since it can be set on the side, it is possible to accumulate the raw materials after sieving in distinctly different places.

Fourth, the sieving apparatus according to any one of the above 1 to 3, wherein the mutual distance between the plurality of grizzly bars in the grizzly sorting mechanism is gradually expanded from the upper end to the lower end. Consists of.

With this configuration, it is possible to prevent the raw material (for example, crushed stone) from being sandwiched between the grizzly bars as much as possible.

Fifth, the vibration feeder is configured by the sieving device according to any one of the first to fourth aspects, which finely reciprocates the taxiway in a direction intersecting the inclination direction.

The direction intersecting the inclination direction means, for example, the arrow P3 direction (for example, an inclination of 40 degrees with respect to the inclination direction). With this configuration, the amount of raw material supplied to the drum rod screen can be made substantially constant, which can improve the efficiency of sieving the drum rod screen. The vibration feeder also has a function as a buffer that suppresses an impact caused by the raw material directly entering the drum rod screen.

Sixth, the first direction and the second direction have an angle difference of 90 degrees to the right (or left), and the first direction and the third direction are left (or right). It is composed of the sieving apparatus according to any one of the above 1 to 5, which has an angle difference of 90 degrees.

The right means, for example, the right direction toward the paper surface with respect to the first direction in FIG. 1, and the left means, for example, the left direction toward the paper surface with respect to the first direction in FIG. With this configuration, on the side of the vertical wall sieving device, the first direction and the second and third directions are clearly distinguished, and raw materials of each size are accumulated in different places on the ground. Can be done.

According to the present invention, since a raw material having a large particle size (for example, crushed stone) can be sorted by the grizzly sorting mechanism, it is not necessary to avoid large crushed stones and the like, and the large crushed stones and the like can be put into the grizzly sorting mechanism. Therefore, efficient sorting becomes possible. Moreover, the three types of raw materials after sieving are clearly divided into three separate locations in each of the three directions (large raw materials in the first direction, medium raw materials in the second direction, and small raw materials in the third direction). Can be accumulated.

In addition, for example, a heavy machine can be placed on a flat surface and raw materials can be charged from the upper part of the grizzly sorting function by using a heavy machine's hydraulic excavator or the like, so that a tall sieving device can be efficiently used in the field. It can be installed.

Further, when the lower end of the grizzly bar of the grizzly sorting mechanism is set as the first direction, the second direction and the third direction are opposite to each other with the first direction as the center on the side of the sieving device for the vertical wall. Since it can be set, the raw materials after sieving can be accumulated in distinctly different places.

Further, since the distance between the grizzly bars increases downward, it is possible to prevent the raw material (for example, crushed stone) from being caught between the grizzly bars as much as possible.

Further, by using the vibration feeder, the supply amount of the raw material charged into the drum rod screen can be made substantially constant, which can improve the efficiency of sieving the drum rod screen. The vibration feeder also has a function as a buffer that suppresses an impact caused by the raw material directly entering the drum rod screen.

Further, on the side of the sieving device for the vertical wall, the first direction and the second and third directions can be clearly distinguished, and the raw materials of each size can be accumulated in different places on the ground.

It is a front view of the sieving apparatus which concerns on this invention. It is a left side view of the same sieving apparatus. It is a partial plan view near the grizzly sorting mechanism of the same sieving apparatus. FIG. 1 is a cross-sectional view taken along the line FF of FIG. 1, and is a partial plan view in the vicinity of the vibration feeder. FIG. 1 is a cross-sectional view taken along the line JJ of FIG. 1, and is a partial plan view in the vicinity of the drum rod screen. It is a right side view of the same sieving apparatus. It is a top view of the grizzly sorting mechanism of the same sieving apparatus. It is a vertical cross-sectional view of the grizzly sorting mechanism of the same sieving apparatus. It is a perspective view of the drum rod screen of the same sieving apparatus. It is a perspective view of the drum rod screen and the vibration feeder of the same sieving apparatus.

Hereinafter, the sieving apparatus according to the present invention will be described in detail (see FIGS. 1 and 2).

First, the outline of the sieving apparatus 1 according to the present invention will be described.
A grizzly sorting mechanism 3 which is inclinedly installed at the uppermost part of the machine frame 2 and whose lower end is directed to the first direction A, a hopper 5 provided below the grizzly bar 4 of the grizzly sorting mechanism 3, and the hopper. A guide path 6 is provided below the machine frame 2 so as to be inclined, and the lower end 6a of the guide path 6 is located at the inlet 7a of the drum rod screen 7 of the next stage and vibrates the guide path 6. A vibration feeder 9 including drive motors (drive means) M1 and M1'to be driven, and an outlet 7b provided at an angle to the machine frame 2 so as to face a second direction B different from the first direction A. The drum rod screen mechanism 33 installed in the above, the drive motors (driving means) M2 and M2'that rotate the drum rod screen 7 along the central axis P1 (see FIG. 5) of the cylinder, and the drum rod screen 7 A conveyor device (conveyor means) provided on the machine frame 2 at a position below the above-mentioned machine frame 2 and transports the raw material under the sieve of the drum rod screen 7 in a third direction C different from the first and second directions A and B. ) 8 and a guide passage 10 provided at the outlet 7b of the drum rod screen 7 and guiding the raw material on the sieve of the drum rod screen 7 in the second direction B.

The machine frame 2 is installed on the foundation concrete (foundation structure) 11 provided on the ground G, and the vertical wall 27 is provided on the surface opposite to the first direction A. (See FIG. 2) A flat surface GH is provided behind the vertical wall 27 at a level higher than the ground G, and the second direction B and the third direction C are opposite to each other. Yes, the raw material can be put into the Grizzly sorting apparatus 3 from the direction of the flat surface GH (see FIG. 2).

Further, the mutual spacing between the plurality of grizzly bars 4 in the grizzly sorting mechanism 3 is configured to be gradually expanded from the upper end to the lower end (see FIGS. 1 and 7).

Further, the vibration feeder 9 is configured to finely reciprocate the taxiway 6 in a direction intersecting the inclination direction (direction of arrow P3 in FIG. 1).

Further, the first direction A and the second direction B have an angle difference of 90 degrees to the right (or left), and the first direction A and the third direction C are to the left (or right). It is configured to have an angle difference of 90 degrees.

Hereinafter, a detailed description will be given.
In FIG. 1, the front side toward the paper is defined as "front" and "front", the back side is defined as "rear" and "rear", and the left and right directions toward the paper are defined as "left and right" and "left and right". (Same for other figures).

(Grizzly sorting mechanism 3)
Foundation concrete (foundation structure) 11 is installed in three rows in the left-right direction on the flat ground G.

A turret-shaped machine frame 2 is constructed on the two foundation concretes 11 and 11 on the left side, and a grizzly sorting mechanism 3 is fixed on the uppermost horizontal upper end machine frame 2a.

In the grizzly sorting mechanism 3, a square frame 12 having downward inclined plates 12a and 12a facing in the first direction A is fixed on the horizontal upper end machine frame 2a (FIGS. 2, 7, and 8). reference). The square frame 12 has an upper surface open to form an upper surface opening 12b, a lower surface to be opened to form a lower surface opening 12c (see FIG. 8), and five grizzly bars 4 inside. It is fixed with a downward slope in parallel with the downward slope plate 12a (see FIG. 8).

More specifically, as shown in FIG. 8, five L-shaped angles 13 are provided at the same level inside the rear plate 12d, and a pair of bearings 14, 14 are provided on the horizontal plane of the L-shaped angles 13. Are provided on the left and right, and the upper end of the grizzly bar 4 is arranged between the bearings 14 and 14, and the upper end of the grizzly bar 4 is fixed to the L-shaped angle 13 by penetrating the bolt 30 in the left-right direction. ing.

Further, at the lower end portion of the grizzly bar 4, a horizontal rod 15 is fixed to the lower surface opening 12c of the downward inclined plates 12a and 12a in the left-right direction (see FIGS. 3 and 8), and the horizontal rod 15 A pair of bearings 16 and 16 are erected on the upper surface, and by arranging the lower end portion of the grizzly bar 4 between the bearings 16 and 16 and penetrating the bolt 30 in the left-right direction, the grizzly bar 4 is described above. The lower end is fixed. In this way, the upper end of each grizzly bar 4 is fixed to the bearings 14 and 14, and the lower end is fixed to the bearings 16 and 16, so that the grizzly bar 4 is inclined downward toward the first direction A. It is installed (see Fig. 3).

Further, a ridge 4a is provided on the upper surface of the grizzly bar 4 in the length direction (see FIGS. 7 and 8), and has a function of crushing stones and the like falling from above.

Further, when viewed in plan view of FIGS. 3 and 7, these grizzly bars 4 gradually widen as the mutual distance between the grizzly bars 4 gradually increases from the distance t1 at the upper end to the distance t2 at the lower end. (T1 <t2). Therefore, the bearings 14 and 14 at the upper end and the bearings 16 and 16 at the lower end are parallel to each other in the front-rear direction at the center as shown in FIG. 16 is attached at a slight angle in the left-right direction.

With this configuration, the raw material is charged into the upper half of the grizzly bar 4 (the charging area E in FIG. 7), but the distance between the grizzly bars 4 increases toward the lower end, so that the crushed stone is crushed. Etc. can be prevented from being caught and stayed between the grizzly bars 4 when rolling downward on the grizzly bars 4.

As shown in FIG. 8, an inclined guide plate 12e is provided between the rear plate 12d and the lower surface opening 12c, is charged into the charging area E, passes between the grizzly bars 4, and falls. The crushed stone or the like is configured to come into contact with the inclined guide plate 12e and bounce off, and then be guided to the front lower surface opening 12c. Further, in the grizzly sorting mechanism 3, crushed stones larger than the gap between the grizzly bars 4 fall from the tip of the lower end of the grizzly bar 4 and are guided in the first direction A.

(Vibration feeder 9)
A hopper 5 is provided below the lower surface opening 12c of the grizzly sorting mechanism 3, and the lower end opening 5a of the hopper 5 opens on the taxiway 6 of the vibration feeder 9. Therefore, the crushed stone or the like that has passed between the grizzly bars 4 falls onto the taxiway 6 from the lower end opening 5a of the hopper 5.

The vibration feeder 9 is provided on the horizontal intermediate machine frame 2b below the hopper 5. In the vibration feeder 9, two front and rear high legs 17a and 17a are fixed on the left side and two front and rear low legs 17b and 17b are fixed on the right side on the horizontal intermediate machine frame 2b (see FIGS. 1 and 4). The taxiways 6 are oscillatedly placed on the rubber springs 18 (4 pieces) via the rubber springs 18 (4 pieces) on the legs 17a to 17b.

Further, two drive motors M1 and M1'are fixed to the left end portion of the taxiway 6 (see FIG. 2). These drive motors M1 and M1'have eccentric weights on the rotating shafts P2 and P2, and by rotating the rotating shafts P2 and P2 in opposite directions, the arrows P3 orthogonal to the rotating shafts P2 (see FIG. 1). ) Can be generated in small increments in the diagonally left-right direction. Such vibration is transmitted from the drive motors M1 and M1'to the taxiway 6, and the taxiway 6 is about 40 degrees with respect to the direction of the arrow P3 (the direction intersecting the inclination direction, for example, the line along the inclination direction). It can be reciprocated in small steps along the direction of the angle).

The taxiway 6 has a structure like a slide having a concave cross section, and the raw material that has fallen from the grizzly sorting mechanism 3 falls into the taxiway 6 in the direction of arrow P3 (diagonal left / right direction). While receiving small reciprocating vibrations (the taxiway 6 is finely reciprocated in the direction along the inclination direction), it is transferred downward by the downward inclination of the taxiway 6 and is inside the inlet 7a of the drum rod screen 7 of the next stage. Is thrown into.

The vibration feeder 9 is used to make the supply amount of the raw material transferred to the drum rod screen 7 of the next stage uniform by vibrating the raw material falling from the grizzly sorting mechanism 3 into the guideway 6. This can improve the efficiency of sieving on the drum rod screen 7. It also functions as a buffer to avoid the impact caused by putting the raw material directly into the drum rod screen 7.

(Drum rod screen 7)
A pair of downwardly inclined inclined machine frames 2c and 2c'are provided on the right side of the turret-shaped machine frame 2 (on the lower end 6a side of the guide path 6) (see FIGS. 1, 5, and 6). On the inlet 7a side, the horizontal plate 2d as a machine frame passed in the front-rear direction between the inclined machine frames 2c and 2c', and on the outlet 7b side, it was passed in the front-rear direction between the inclined machine frames 2c and 2c'. A horizontal plate 2d'as a machine frame is provided. Then, on the horizontal plate 2d', bearings 28, 28'of the driving rollers 19, 19' having a rotation axis parallel to the tilting machine frames 2c, 2c' are provided in the front-rear direction, and the bearing 18 Drive motors M2 and M2'are installed to drive the driving rollers 19 and 19'via 18'.

On the other hand, as shown in FIG. 5, bearings 20 and 20'having the same central axis as the rollers 19 and 19'are provided on the horizontal plate 2d in the front-rear direction, and the rollers 21 and 20' are provided on the bearings 20 and 20'. , 21'is provided. The drive roller 19 and the roller 21 are connected by a connecting shaft 22, and the drive roller 19'and the roller 21'are connected by a connecting shaft 22'.

The drum rod screen 7 is placed on the four rollers 19, 19'and the rollers 21, 21'(see FIGS. 5 and 6).

As shown in FIG. 9, the drum rod screen 7 is provided with annular frames 23a and 23b on both sides, and a plurality of rods 24 are arranged on the circumferences of the annular frames 23a and 23b between the annular frames 23a and 23b. By being provided along the rod 24, a cylindrical rotary sieve having a gap between the rods 24 is formed. In the drum rod screen 7, the annular frame 23a on the inlet 7a side is installed on the rollers 21 and 21', and the annular frame 23b on the outlet 7b side is installed on the driving rollers 19, 19'. Then, by the rotation of the driving rollers 19 and 19', the cylinder is rotated in the direction of arrow D in FIG. 6 about the central axis P1 (see FIG. 5) (parallel to the tilting machine frames 2c and 2c') of the cylinder. It is a thing.

Reference numeral 29 (see FIGS. 1, 6, and 10) is a housing that covers the upper half of the drum rod screen 7, and an opening 25 is formed below the drum rod screen 7. A cylindrical shape composed of the tilting machine frames 2c and 2c', the horizontal plates 2d and 2d', the driving rollers 19 and 19', the rollers 21 and 21', the drum rod screen 7, the housing 29 and the like. The screen is referred to as a drum rod screen mechanism 33.

The rods 24 of the drum rod screen 7 are provided with fixed rods 24a (8 rods) at positions of approximately 45 degrees in the circumferential direction of the annular frame, and are fixed to the annular frames 23a and 23b. The skeleton is formed by the rod 24a. Then, three, four to five rotating rods 24b (square rods having a square cross section) are arranged between the fixed rods 24a. Both ends of these rotating rods 24b are pivotally supported without being fixed to the annular frames 23a and 23b, and therefore each square rod can rotate (rotate) about its own rod central axis. It is configured as follows.

Therefore, when the raw material is supplied from the induction path 6 in the previous stage into the rotating drum rod screen 7 from the inlet 7a, the raw material is rotated in the drum in the arrow D direction by the rotating drum rod screen 7. , While repeating ascending and descending, the raw material is transferred in the direction of the lower outlet 7b, during which the raw material smaller than the opening between the rods 24 falls downward, and the raw material larger than the opening falls from the outlet 7b to the outlet side cylinder. It is discharged to 32 (see FIGS. 5 and 6), and is further accumulated in the second direction B via the guide passage 10.

Considering that the first direction A is "forward", the second direction B is a direction rotated 90 degrees to the right with respect to the first direction A, whereby the first direction B is obtained. The largest raw material accumulated in the direction A and the medium raw material accumulated in the second direction B can be selected and accumulated.

(Conveyor conveyor device 8)
Next, the vertical machine frames 2e and 2e between the inclined machine frames 2c and 2c'and the rightmost foundation concrete 11, the foundation concretes 11 and 11 of the turret-shaped machine frame 2, and the intermediate horizontal machine frame 2b. A space between the vertical machine frames 2e and 2e, that is, below the opening 25 of the drum rod screen 7, in a direction opposite to the second direction B (third direction C). The conveyor device 8 traveling (in the direction of the arrow S) is fixed at the same inclination angle as the inclination machine frame 2c.

The conveyor belt 8a of the conveyor device 8 travels in the upward direction in the arrow S direction (from right to left), receives the raw material that has fallen from the drum rod screen 7, and conveys it in the left direction (arrow S direction). Then, the raw materials are accumulated in the third direction C. M3 is a conveyor belt drive motor.

As shown in FIG. 6, in this conveyor device 8, horizontal bases 34 are provided at predetermined intervals in the traveling direction, horizontal rollers 35a are provided in the center on the horizontal bases 34, and inclined rollers 35b are provided in front of and behind the horizontal rollers 35a. , 35b'are provided, and the conveyor belt 8a on each of the rollers is a trough-type conveyor device having a concave cross section. Further, the conveyor device 8 is fixed to the machine frame 2 by fixed angles 37a and 37b.

(Vertical wall 27)
In this sieving device 1, as described above, the foundation concrete 11 is provided on the ground G, and the turret-shaped machine frame 2, the inclined machine frames 2c, 2c', the vertical machine frame 2e, etc. are placed on the foundation concrete 11. The grizzly sorting mechanism 3 is installed at the uppermost portion, the vibration feeder 9 and the drum rod screen mechanism 33 are installed at the intermediate portion, and the conveyor device 8 is installed at the lowermost portion. Therefore, since the distance from the ground G to the uppermost grizzly sorter 3 is about 8 m to 10 m and is tall, there is a problem of how to put the raw material from above the grizzly sort mechanism 3 at the site.

In this respect, the sieving device 1 according to the present invention is provided with a vertical wall 27 (for example, made of concrete) behind the turret-shaped machine frame 2 in parallel with the machine frame 2, and is behind the vertical wall 27. In addition, a flat surface GH is formed at a position higher than the level of the ground G.

Therefore, as shown in FIG. 2, the heavy machine 36 is placed on the flat surface GH, and the raw material at the site is put into the grizzly bar 4 from the rear side of the grizzly sorting mechanism 3 by the hydraulic excavator of the heavy machine 36 or the like. It may be put into E (see arrow I in FIG. 2). In FIG. 2, reference numeral 26 is a control panel.

In FIG. 1, reference numeral 2f is a lower horizontal machine frame, reference numeral 2f'in FIG. 2 is a lower horizontal machine frame in the front-rear direction, reference numeral 38 is a scaffolding around the grizzly sorting mechanism 3 (see FIG. 3), and reference numeral 39 is (see FIG. 4). ) Scaffolding around the vibration feeder 9, reference numeral 40 is the scaffolding around the drum rod screen mechanism 33, reference numeral 41 (see FIG. 3) is the guard of the ladder up to the grizzly sorting mechanism 3, and reference numeral 42 (see FIG. 2) is the vibration feeder. Guard of ladders up to 9,

Since the present invention is configured as described above, the operation of sieving the raw materials by the sieving apparatus 1 according to the present invention will be described next.

It is assumed that the sieving device 1 is installed as shown in FIGS. 1 and 2 at a crushed stone site of a limestone mine, for example. That is, at the crushed stone site, for example, three rows of foundation concrete 11 are installed on the ground G, a turret-shaped machine frame 2 is constructed on the foundation concrete 11, and grizzly sorting is performed on the machine frame 2 on the foundation concrete 11. A mechanism 3, a vibration feeder 9, a drum rod screen mechanism 33, and a conveyor device 8 are installed, a vertical wall 27 is installed behind the grizzly sorting mechanism 3 with concrete, and the vertical wall 27 is on the opposite side of the grizzly sorting mechanism 3. A flat surface GH is installed on the flat surface GH, the heavy machine 36 is put into the flat surface GH, and the raw material is charged from behind the grizzly sorting mechanism 3 into the charging area E of the grizzly sorting mechanism 3 by a hydraulic shovel or the like of the heavy machine 36. ..

In this case, the distance between the grizzly bars 4 of the grizzly sorting mechanism 3 is t1 = 150 mm and t2 = 300 mm. The distance (opening) between the rods 24 of the drum rod screen 7 is 40 mm.

The above raw materials include large stones with a particle size (grain size) of 300 mm or more, medium stones (crushed stones, etc.) with a particle size (grain size) of 300 mm to 40 mm, and particle size (grain size). It is classified into small stones of 40 mm or less (crushed stones, etc.) and soil or mud, and these raw materials are classified into stones with a particle size of 300 mm or more (crushed stones, etc.), stones with a particle size of 300 mm to 40 mm (crushed stones, etc.), and grains. Sort stones (crushed stones, etc.), soil, mud, etc. with a diameter of 40 mm or less.

Further, it is assumed that the drive motors M1 and M1'are driven by the operation of the control panel 26, and the vibration feeder 9 vibrates the taxiway 6 in the direction of the arrow P3. Further, it is assumed that the drum rod screen 7 is rotating in the direction of arrow D by driving the drive motors M2 and M2'. Further, it is assumed that the drive motor M3 is driven and the conveyor belt 8a of the conveyor device 8 is traveling in the direction of arrow S.

In the above situation, the heavy machine 36 is mounted on the flat surface GH, and the raw material (including large and small stones and mud, soil, etc.) containing large crushed stone having a particle size of 300 mm or more is scooped and rotated by a hydraulic excavator at the tip of the boom. As shown by the arrow I in FIG. 2, the material is charged from the upper part of the grizzly sorting device 3 into the substantially charging area E (see FIG. 7) of the grizzly sorting device 3 from the upper part.

Then, the raw material falls on the grizzly bar 4, and the crushed stone having a particle size larger than the distance t2 (= 300 mm) between the grizzly bars 4 rolls down along the inclination of the grizzly bar 4 and is the first from the tip of the grizzly bar 4. It falls in the direction A of 1, and falls on the ground G in the first direction A and is accumulated. Therefore, large stones (crushed stones, etc.) having a particle size of 300 mm or more are accumulated on the ground G in the first direction A.

Stones with an interval t1 = 150 mm or less between the grizzly bars 4, crushed stones with an interval t1 = 150 mm or more and an interval t2 = less than 300 mm, soil, mud, etc. fall downward from the interval between the grizzly bars 4, and the hopper 5 It is put into the guide path 6 of the vibration feeder 9 via the above. At this time, the raw material in contact with the inclined guide plate 12e of the grizzly sorting mechanism 3 rebounds and is guided in the direction of the lower surface opening 12c, falls in the direction of the lower vibration feeder 9, and is charged into the guide path 6.

Further, since the interval between the grizzly bars 4 gradually increases from the upper end to the lower end, it is possible to prevent the stone from being caught in the interval and getting stuck in the process of rolling the raw material (stone) downward. ..

As for the raw material (raw material less than 300 mm) that has fallen on the vibration feeder 9, the taxiway 6 vibrates in the direction of arrow P3 (diagonally left and right), so that mud, soil, etc. adhering to the stone are separated from the stone. The taxiway 6 moves downward along the downward inclination of the taxiway 6, and is inserted into the rotating drum rod screen 7 from the lower end 6a of the taxiway 6 via the short cylinder 31 at the inlet 7a.

At this time, since the raw material gradually descends along the downward inclination of the guideway 6 while being vibrated by the vibration feeder 9, the raw material charged into the drum rod screen 7 is a substantially fixed amount per unit time. A fixed quantity supply can be realized.

The raw material charged into the drum rod screen 7 is rotated in the drum rod screen 7, and gradually moves in the direction of the outlet 7b along the downward inclination while repeating ascending and descending. During that time, the raw materials (stones less than 40 mm, other mud, soil, etc.) below the opening between the rods 24 fall downward from between the rods 24 through the opening 25, and the conveyor belt of the conveyor device 8 located below. It is thrown on 8a.

Since the conveyor belt 8a is moving in the direction of arrow S, the raw material charged on the conveyor belt 8a is immediately conveyed in the direction of arrow S, and is charged in the third direction C from the tip of the conveyor device 8. And accumulated on the ground G in the third direction C. Therefore, stones such as crushed stones of less than 40 mm, mud, soil, etc. are accumulated on the ground G in the third direction C.

On the other hand, in the drum rod screen 7, a raw material having a particle size of 40 mm or more (however, 300 mm or less) is thrown into the guide passage 10 from the outlet 7b of the drum rod screen 7 via the outlet side cylinder 32. It descends on the downhill slope of the guide passage 10 and is accumulated on the ground G in the second direction B.

By the above operation, raw materials having a particle size of 300 mm or more (crushed stones, etc.) are accumulated on the ground G in the first direction A, and raw materials having a particle size of less than 300 mm and 40 mm or more (crushed stones, etc.) are collected on the ground in the second direction B. Raw materials (crushed stone, soil, mud, etc.) that accumulate on G and are less than 40 mm can be accumulated on the ground G in the third direction C, and moreover, the second direction A with respect to the first direction A. The direction B is 90 degrees different from the right direction, and the third direction C is 90 degrees different from the first direction A to the left. Therefore, each raw material is clearly defined for each particle size. Can be accumulated in different places.

Moreover, unlike the conventional method, when the raw material is charged into the sieving device 1, it is not necessary to sort the raw materials of 300 mm or more, and the stones of 300 mm or more can be charged into the sieving device with a hydraulic excavator. Productivity can be greatly improved, and products of three brands (stones of three types of particle sizes, etc.) can be collected.

According to the present invention, since a raw material having a large particle size (for example, stone) can be sorted by the grizzly sorting mechanism 3, it is not necessary to avoid a large raw material (for example, stone), and a grizzly including a large raw material (for example, stone) is included. It can be input to the sorting mechanism 3 and efficient sorting is possible. Moreover, the three types of raw materials after sieving are clearly placed in different locations in each of the three directions (large raw material in the first direction A, medium raw material in the second direction B, and small raw material in the third direction C). It can be divided into and accumulated.

Further, for example, a heavy machine 36 can be mounted on a flat surface GH, and a raw material can be charged from the upper part of the grizzly sorting function 3 by using a hydraulic excavator of the heavy machine 36 or the like. In, it becomes possible to install efficiently.

Further, when the lower end of the grizzly bar 4 of the grizzly sorting mechanism 3 is set as the first direction A, the second direction B and the second direction B and the second direction B and the second direction A are centered on the first direction A on the side of the sieving device 1 of the vertical wall 27. Since the direction C of 3 can be set on the opposite side, the raw materials after sieving can be accumulated in clearly different places.

Further, since the distance between the grizzly bars 4 increases downward, it is possible to prevent the raw material (for example, stone) from being sandwiched between the grizzly bars 4 as much as possible.

Further, by using the vibration feeder 9, the supply amount of the raw material charged into the drum rod screen 7 can be made substantially constant, and thereby the efficiency of sieving of the drum rod screen 7 can be improved. Further, the vibration feeder 9 also has a function as a buffer for suppressing an impact caused by the raw material directly entering the drum rod screen 7.

Further, on the side of the sieving device 1 of the vertical wall 27, the first direction A and the second and third directions B and C are clearly distinguished, and the raw materials of each size are placed in different places on the ground G. Can be accumulated.

The second direction B is provided on the right and the third direction C is provided on the left with respect to the first direction A, but the left and right may be reversed. Further, the particle size of the stone is based on 300 mm as an example, but is not limited to this. Further, although the crushing site has been described as an example, the sieving apparatus according to the present invention is not limited to this, and is used for various sieving such as various industrial wastes, dredged soil sieving, and removal of incinerator ash foreign matter. It is possible to do.

According to the sieving apparatus according to the present invention, for example, in sieving of a quarry, sieving of industrial waste, sieving of dredged soil, etc., the sieving operation can be performed extremely efficiently.

1 Sieving device 2 Machine frame 3 Grizzly sorting mechanism 4 Grizzly bar 5 Hopper 6 Taxiway 7 Drum rod screen 7a Inlet 7b Exit 8 Conveyor device 9 Vibration feeder 11 Foundation concrete 10 Guide passage 27 Vertical wall 33 Drum rod screen mechanism A 1st Direction B Second direction C Third direction M1, M1'Drive motor M2, M2' Drive motor M3 Drive motor G Ground GH Flat surface P1 Central axis P3 Arrow

Claims (6)

A grizzly sorting mechanism that is installed at the top of the machine frame, has multiple grizzly bars with a downward slope, and has the lower end of each grizzly bar directed in the first direction.
A hopper provided below the grizzly bar to receive the raw material under the sieve of the grizzly bar, and
Below the hopper, the taxiway is provided on the machine frame with a downward inclination, the lower end of the taxiway is located at the entrance of the drum rod screen of the next stage, and a driving means for vibrating the taxiway is provided. Vibration feeder and
It has the cylindrical drum rod screen provided on the machine frame with a downward inclination and the outlet is installed so as to face a second direction different from the first direction, and the drum rod screen is of the cylinder. A drum rod screen mechanism with a driving means that rotates along a central axis, and
Conveyor means provided in the machine frame below the drum rod screen and transporting the raw material under the sieve of the drum rod screen in a third direction different from the first and second directions.
A sieving device provided at the outlet of the drum rod screen and configured by a guide passage for guiding the raw material on the sieve of the drum rod screen in the second direction. The above machine frame is installed on the foundation structure provided on the ground.
A vertical wall is provided behind the sieving device on the side opposite to the first direction, and a flat surface is provided on the side of the vertical wall opposite to the sieving device at a level higher than the ground. ,
The sieving apparatus according to claim 1, wherein the raw material can be charged into the grizzly sorting mechanism from the upper part of the grizzly sorting mechanism from the side of the flat surface. The sieving device according to claim 2, wherein the second direction and the third direction are opposite directions to each other on the side of the sieving device with the vertical wall as a boundary. The sieving apparatus according to any one of claims 1 to 3, wherein the mutual distance between the plurality of grizzly bars in the grizzly sorting mechanism is gradually expanded from the upper end to the lower end. The sieving device according to any one of claims 1 to 4, wherein the vibration feeder finely reciprocates the taxiway in a direction intersecting the inclination direction. The first direction and the second direction have an angle difference of 90 degrees to the right (or left), and the first direction and the third direction are 90 degrees to the left (or right). The sieving apparatus according to any one of claims 1 to 5, which has an angle difference.

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