JP3540607B2 - Aggregate laminating method and laminating apparatus - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a production method and an apparatus for mixing a particle size of an aggregate such as a filter material used when constructing a filter portion of a dam body.
[0002]
[Prior art]
The filter material for constructing the filter of the embankment of the rockfill dam is produced by mixing crushed crushed stone and sand. However, it is not preferable that only coarse crushed stone or only fine sand is unbalanced. That is, it is necessary that coarse crushed stone, fine crushed stone, sand, and the like are uniformly mixed throughout.
[0003]
FIG. 6 is a view showing a conventional aggregate laminating method in the order of steps. First, as shown in (1), the blasted ore 21 is loaded on a truck 23 by a shovel car 22 or the like and transported to the crushing site in (2). Then, after being supplied to the crusher 24 and crushed, it is transferred to the intermediate stock yard (3) by the belt conveyor 25 and piled up.
[0004]
The filter material 27 is piled up, but is dropped from a high position by the conveyor 26, so that it has a conical shape. By the way, the crushed crushed stones vary in particle size, and are mixed from coarse to fine. The particle size becomes finer toward the core side of the piled filter material 27.
[0005]
Therefore, if the filter material 27 in which the coarse aggregate and the fine aggregate are separated as described above is carried to the dam construction site as it is and used for the construction of the filter portion of the dam embankment, the granularity may be coarse depending on the location of the filter portion. In addition, the particle size is uneven due to thinness, and as a result, the function as the filter unit cannot be achieved.
[0006]
Therefore, as shown in (4), the hill 27 of the filter material is broken down by the shovel car 22 or the like, placed on the truck 23, transported to the filter material stock yard in (6), and laid flat. Since crushed stone alone does not provide enough fine aggregate, the sand is carried by the truck 23 as shown in (5) and mixed with crushed stone, or crushed stone and sand are alternately spread over the stockyard of (6).
[0007]
This spreading operation is performed by the bulldozer 28 or the like, but when this operation is repeated, a layer is formed as shown in S1, S2, S3, and so on. The layered filter material is cut from the uppermost layer to the lowermost layer by a shovel car 22 or the like, transported to a construction site by a truck 23, and used for filling the filter portion of the embankment.
[0008]
Within each of the layers S1, S2, S3,... Of (6), even if the particle size distribution is uneven in the in-plane direction, the distribution is not necessarily uneven between adjacent layers. Therefore, when cutting from the uppermost layer to the lowermost layer, a filter material in which large and small crushed stones are uniformly mixed is obtained.
[0009]
[Problems to be solved by the invention]
As described above, according to the conventional method of mixing the particle size of aggregates and the like, coarse aggregates and fine aggregates are separated in the intermediate stockyard. Increase. In particular, a large amount of work is performed by construction machines such as shovel cars, trucks, and bulldozers, resulting in high costs due to labor costs, equipment costs, and fuel costs. In terms of location, it requires two stockyards.
[0010]
When the particle size distribution of the crushed stone is biased toward the coarse grain side, sand is replenished and balanced.However, it is difficult to prevent the particle size distribution from being biased by the conventional method based on intuition, and the quality of the filter material is poor. There is a risk of decline.
[0011]
The technical problem of the present invention is to pay attention to such a problem, and to automatically and inexpensively obtain a high-quality aggregate with less deviation in particle size distribution in one stockyard. .
[0012]
[Means for Solving the Problems]
The technical problem of the present invention is solved by the following means. Claim 1 is an operation of a B pattern in which the aggregate falling section intermittently pivots by a predetermined angle and drops the aggregate while moving in the radial direction at each set angle; The part A intermittently moves in the radial direction by a predetermined distance, and in each set radial position, within a predetermined angle range, the operation of the A pattern of dropping the aggregate while turning, by repeating alternately the fan-shaped area, which is a method of laminating such aggregate, characterized in that going stacked aggregate in layers.
[0013]
Thus, the B-pattern operation of dropping the aggregate while reciprocating in the radial direction and laying the aggregate in the circumferential direction, and dropping the aggregate while reciprocating in the circumferential direction, and operation of the spread to go a pattern, since it is repeatedly to go lamination method alternately, while dispersing the aggregate in the surface direction can be stacked in layers, yet the the layer of the layer and a pattern B pattern Since the directions of the ridges are substantially orthogonal to each other, when viewed in a vertical section as shown in FIG. 4, there is little variation in the aggregate particle size in the vertical direction. Finally, as shown in FIG. 1, the pile HA of the aggregate thus laminated is cut out by the shovel car 17 and loaded on the truck 18 or the like. Are uniformly mixed, and a high-quality aggregate with less deviation in particle size distribution can be realized.
[0014]
Moreover, construction machinery such as shovel cars, trucks, and bulldozers are not required and can be automated, so that an inexpensive aggregate can be obtained.
[0015]
According to a second aspect of the present invention, a plurality of fan-shaped areas having the same center of rotation are provided, and while the laminating operation according to the first aspect is performed in one of the areas, the aggregate in another area that has already been laminated is used. A method of laminating aggregates and the like, characterized in that an operation of carrying out to a site is performed.
[0016]
In this way, the area is divided into a plurality of fan-shaped areas, and while the above-described laminating operation is being performed in one of the areas, the aggregate is carried out from another area that has already been laminated to the use site. Operations can be performed independently so that they do not interfere with each other, and safety is ensured. In addition, work efficiency is improved, and it is possible to contribute to shortening the construction period.
[0017]
According to a third aspect of the present invention, the frame for holding the stacked conveyor is configured to reciprocate around the center of rotation. After moving from the end side to the chute portion, dropping the aggregate at the chute portion, traveling to the outer end of the turn, making a U-turn, and on the return side, traveling in the opposite direction to the inner end side of the turn. that you have a structure, the chute portion for dropping the aggregate from laminated conveyor is in a state where the layered conveyor is guided by the pulleys and guide rollers, on guide rails provided on said frame, pivot it has a structure of round trip between the inner end and the turning outer end, at about the turning center, it has a structure in which the aggregate is supplied onto the laminated conveyor, aggregate, wherein A laminating device.
[0018]
As described above, since the frame holding the stacked conveyor is configured to reciprocate around the center of rotation, the frame is intermittently swiveled by a predetermined angle, and at each set angle, the stacked conveyor is rotated. In a state where is guided by a pulley or a guide roller, on a guide rail provided on the frame, a chute portion for dropping an aggregate reciprocates between a turning inner end side and a turning outer end to move in a radial direction. The operation of the B pattern in which the aggregate is dropped while moving to the position is enabled. Further, the chute for dropping the aggregate intermittently moves in the radial direction by a predetermined distance, and at each set radial position, the frame holding the stacked conveyor reciprocates around the center of rotation. By repeating the operation of the pattern A in which the aggregate is dropped while repeating, the aggregate can be layered in the fan-shaped area. Further , since the structure is such that the aggregate is supplied onto the laminated conveyor at the center of rotation, the supply of the aggregate to the laminated conveyor can be performed very easily and efficiently.
[0019]
A fourth aspect of the present invention has a sand conveyor for supplying sand onto an aggregate conveyor for supplying aggregate to the center of rotation of the laminated conveyor according to claim 3, wherein the sand is supplied onto the sand conveyor. It is an aggregate laminating apparatus having a sand bottle having a function of controlling the amount.
[0020]
In this way, since the sand bin is equipped with a function to control the amount of sand supplied to the sand conveyor, if the aggregate particle size distribution is biased toward the coarser side, the sand bin supplies the sand onto the sand conveyor. By increasing the amount of sand produced, the amount of sand can be replenished. In addition, once the supply amount of sand is set, the supply amount is maintained thereafter, so that it is possible to supply high-quality aggregate at low cost.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment will be described as to how the aggregate laminating method and the laminating apparatus according to the present invention are actually embodied. FIG. 1 is a perspective view showing the whole of a method and apparatus for laminating aggregates according to the present invention.
[0022]
Reference numeral 1 denotes a stacked conveyor, which can reciprocate around a shaft 3 while being held by a frame 2. The turning device mounted on the turning outer end 2o of the frame 2 is provided with turning wheels 4 and can be turned in a range of, for example, 291 degrees by being rotationally driven by a motor. The stacked conveyor 1 travels from the turning inner end 2i to the turning outer end 2o as shown by an arrow a1.
[0023]
FIG. 2 is a side view showing a traveling route of the laminated conveyor 1, and a moving chute 5 which reciprocates between a turning inner end 2i and a turning outer end 2o on a guide rail provided on a frame 2, An upper pulley (tripper pulley) P1 and a lower pulley P2 are supported.
[0024]
Both ends of the stacked conveyor 1 are supported by a tail pulley P3 on the turning center side and a head pulley P4 on the turning outer end side, and are driven to travel. The forward path traveling in the direction of the arrow a1 is guided by the upper pulley P1 of the moving chute from the tail pulley P3 and then guided by the lower pulley P2 to travel in a Z-shape.
[0025]
Therefore, the aggregate conveyed by the stacked conveyor 1 climbs up to the pulley P1 above the moving chute 5 and then falls when passing through the upper pulley P1, and extends outside the frame in FIG. After passing through the chute 6, it falls on the stock yard like 7.
[0026]
The stacked conveyor 1 having passed through the lower pulley P2 is guided by a guide pulley P5 and a number of guide rollers R1,... And travels in the direction of the arrow a1 again. It will be a return trip of the direction.
[0027]
On the return route, it passes over the snap pulley P6, then passes over a number of guide rollers R2,..., And reaches the original tail pulley P3 via bend pulleys P7 and P8 that apply tension to the stacked conveyor 1.
[0028]
Since the moving chute 5 can reciprocate in the region of L between the inner end indicated by the solid line and the outer end indicated by the chain line, the position of the moving chute 5 in the turning radial direction, that is, the position in the running direction of the stacked conveyor 1 must be selected. Accordingly, the position of dropping aggregate, 7 _1, 7 ₂ freely choose as ～7N.
[0029]
The driving of the moving chute 5 is performed by winding a wire stretched from the left and right on the moving chute 5 by a motor, but is not limited to this. In addition, it is possible to continuously travel back and forth between the start end and the end of the stroke L, or to perform intermittent travel in which the vehicle travels a predetermined distance and then stops.
[0030]
The supply of the aggregate to the laminated conveyor 1 is performed as follows. When the ore carried by the truck 8 or the like in FIG. 1 is put into the ore hopper 9, it is supplied to the crusher 11 via the apron feeder 10 and crushed.
[0031]
The crushed crushed stones are put into the hopper 13 provided above the turning center of the laminated conveyor 1 by the aggregate conveyor 12, supplied to the turning center of the stacked conveyor 1, and then transferred to the moving chute 5 side. Is done.
[0032]
Reference numeral 14 denotes a sand bottle. A set amount of sand is supplied by a sand conveyor 15 into a hopper 16 provided on the aggregate conveyor 12 and added to the aggregate on the aggregate conveyor 12.
[0033]
FIG. 3 is a plan view illustrating a method of laminating using the above-described aggregate laminating apparatus. The frame 2 of the stacked conveyor 1 can be turned around the central axis 3 by, for example, 291 degrees, and this area is divided into three zones having a fan shape of 97 degrees, that is, an A zone, a B zone, and a C zone. . Then, the operations of the B pattern and the A pattern shown in the C zone are performed alternately.
[0034]
First, on the aggregate conveyor 12 to which the aggregate has been supplied from the crusher 11, sand is added from the sand bin 14 and is continuously supplied to the turning center side of the laminated conveyor 1. In this state, in the operation of the pattern B, in the zone C, the turning chute by the wheels 4 is stopped, and the moving chute 5 is continuously driven from the inner end to the outer end within the stroke L. Then, the aggregate falls from the chute 6 to form a ridge in the radial direction.
[0035]
Next, the wheel 4 is driven to rotate the frame 2 counterclockwise by a predetermined angle, for example, about 2 degrees, and then the moving chute 5 is continuously driven from the outer end to the inner end. Then, the aggregate falls from the chute 6 to form a ridge in the radial direction. Next, after turning a predetermined angle again, the moving chute 5 is continuously driven from the inner end to the outer end in the same manner as described above.
[0036]
By repeating such an operation up to the end of the C zone, a radial ridge is formed in the C zone. It is to be noted that the aggregate may continue to fall from the chute portion 6 while the frame 2 is turning.
[0037]
Next, the operation proceeds to the operation of the pattern A. Assuming that the operation of the pattern B ends in a state where the moving chute 5 has moved to the outer end 2o side of the frame, the frame 2 is rotated clockwise with the moving chute 5 stopped without continuously moving. After turning 97 degrees, the moving chute 5 is moved to the turning center 3 side by a predetermined distance, for example, about 1 m.
[0038]
Then, the operation of turning the frame 2 97 degrees counterclockwise, moving the moving chute 5 to the turning center 3 side by about 1 m, and turning clockwise again is repeated, as shown in FIG. concentric ridges 7 _1, 7 ₂ ~7n is formed. When the moving chute 5 moves to the inner end of the stroke L, the operation of the pattern A ends. Next, the turning operation is intermittently performed again by a predetermined angle, and the moving chute 5 is continuously reciprocated in the radial direction. Then, the operation of the B pattern is performed.
[0039]
FIG. 4 is a cross-sectional view taken along the line XX in FIG. 3. A layer B1 composed of radial ridges is formed by the operation of the B pattern, and a concentric layer A1 is formed thereon by the operation of the A pattern. . Further, a radial ridge layer B2 is superposed thereon by the operation of the B pattern. Therefore, the ridges of the adjacent layers are orthogonal to each other. In this way, the layers of the pattern A and the pattern B are alternately stacked until the height becomes about 2 m.
[0040]
The zone C in FIG. 1 is a state where the lamination is completed, and the zone B is a state where the lamination operation is being performed. The zone A is in a state where the pile HA of the stacked aggregate is cut off by the shovel car 17 and is loaded onto the construction site by the truck 18 or the like.
[0041]
In the present invention, the stock yard is divided into three zones, and a buffer band 19 is provided between adjacent zones as shown in FIG. In addition, as illustrated in FIG. 5, safety is achieved by shifting a zone in which lamination is performed and a zone in which unloading is performed.
[0042]
That is, assuming that the A zone is being stacked, the aggregate mountains HC in the already stacked C zone are cut out and carried out. When this is completed, the C zone is stacked, and the aggregate HB in the B zone that has already been stacked is cut out and carried out. Next, while the B zone is being stacked, the A zone is carried out.
[0043]
In this way, dividing into a plurality of zones and carrying out aggregate operation in one zone while carrying it out from another zone will enable continuous production and carry-out of aggregate, improving efficiency. In addition, no interference occurs between adjacent zones, so that security can be ensured.
[0044]
If the crushed crushed stone is coarse, sand is mixed to adjust the particle size balance, but the particle size of the crushed stone varies depending on the lot being conveyed. Therefore, it is preferable to control the amount of sand added from the sand bin 14 according to the particle size of the aggregate supplied from the crusher 11 to the aggregate conveyor 12.
[0045]
In order to achieve this, the structure is such that the amount supplied from the sand bin 14 to the sand conveyor 15 is adjusted. For example, by adjusting the opening amount of the outlet of the sand bin 14 or changing the frequency of the outlet, the amount of sand drawn out can be changed, and the particle size of the aggregate supplied from the crusher 11 to the aggregate conveyor 12 is monitored. However, when the grain size is coarse, the drawing amount is increased, and when the aggregate particle size is small, the drawing amount is reduced.
[0046]
Fully automatic operation is possible by monitoring the aggregate particle size with a sensor and controlling the amount of sand withdrawn by changing the opening amount and frequency of the sand bin outlet based on the detection signal.
[0047]
【The invention's effect】
According to claim 1, the operation of the B pattern in which the aggregate is dropped while reciprocating in the radial direction and the aggregate is spread in the circumferential direction, and the aggregate is dropped while reciprocating in the circumferential direction, and operation of the a pattern going paved in direction, since it is repeatedly to go lamination method alternately, while dispersing the aggregate in the surface direction can be stacked in layers, yet the layers of the layer and a pattern B pattern Since the directions of the ridges are almost orthogonal to each other, when viewed in a vertical section as shown in FIG. 4, there is little variation in the aggregate particle size in the vertical direction. Finally, as shown in FIG. 1, the pile HA of the aggregate thus laminated is cut by the shovel car 17 and loaded on the truck 18 or the like. Are uniformly mixed, and a high-quality aggregate with less deviation in particle size distribution can be realized.
[0048]
Moreover, construction machinery such as shovel cars, trucks, and bulldozers are not required and can be automated, so that an inexpensive aggregate can be obtained.
[0049]
In order to divide the aggregate into a plurality of fan-shaped regions and to carry out the aggregate from another region already laminated to the use site while performing the laminating operation in a certain region as in claim 2, Each operation can be performed independently so as not to interfere with each other, and safety is ensured. In addition, work efficiency is improved, and it is possible to contribute to shortening the construction period.
[0050]
As in claim 3, since the frame holding the laminated conveyor has a structure that reciprocates around the center of rotation, the frame intermittently rotates by a predetermined angle, and at each set angle, In a state where the laminated conveyor is guided by pulleys and guide rollers, a chute for dropping aggregates reciprocates between a turning inner end and a turning outer end on a guide rail provided on the frame. Thus, the operation of the B pattern in which the aggregate is dropped while moving in the radial direction becomes possible. In addition, the chute portion for dropping the aggregate intermittently moves in the radial direction by a predetermined distance, and at each set radial position, the frame holding the laminated conveyor reciprocates around the center of rotation. By repeating the operation of the pattern A in which the aggregate is dropped while repeating, the aggregate can be layered in the fan-shaped area. Furthermore , since the structure is such that the aggregate is supplied onto the stacked conveyor at the center of rotation, the supply of the aggregate to the stacked conveyor can be extremely easily and efficiently performed.
[0051]
Since the sand bin is provided with a function of controlling the amount of sand supplied onto the sand conveyor as in claim 4, if the particle size distribution of the aggregate is biased toward a coarser direction, the sand conveyor is moved from the sand bin. The amount of sand can be replenished by increasing the amount of sand supplied above. Moreover, once the supply amount of the sand is set, the supply amount is maintained thereafter, so that the aggregate having excellent quality can be supplied at low cost.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the whole of a method and apparatus for laminating aggregates according to the present invention.
FIG. 2 is a side view of the laminated conveyor of FIG.
FIG. 3 is a plan view illustrating a method of stacking using the aggregate stacking device of FIG. 1;
FIG. 4 is an enlarged sectional view taken along a line XX in FIG. 3;
FIG. 5 is a chart showing a combination of a zone for stack production and a zone for carrying out work.
FIG. 6 is a diagram showing a conventional aggregate laminating method in the order of steps.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stacked conveyor 2 Frame 3 Center shaft 4 Wheels P1-P6 Conveyor pulley 5 Moving chute 6 Chute part 7 Falling aggregate
7 ₁ , 7 ₂ -7 n Concentric ridges 9 Rough hopper 11 Crusher 12 Aggregate conveyor 14 Sand bin 15 Sand conveyor 19 Buffer zone HA-HC Stacked pile of aggregate

Claims (4)

An operation of a B pattern in which the aggregate falling portion intermittently pivots by a predetermined angle and drops the aggregate while moving in the radial direction at each set angle;
A-pattern operation in which the aggregate falling portion intermittently moves in the radial direction by a predetermined distance, and drops the aggregate while turning in a predetermined angle range at each set radial position. And by repeating alternately,
The fan-shaped area, the method of laminating the aggregate, characterized in that going stacked aggregate in layers. A plurality of fan-shaped regions having the same center of rotation are provided, and while the above-described laminating operation is performed in a certain region, an operation of carrying out aggregates in another region that has already been laminated to a use site is performed. The method for laminating aggregates according to claim 1, wherein: The frame holding the laminated conveyor has a structure that reciprocates around the center of rotation ,
The laminated conveyor is guided by a plurality of pulleys and guide rollers on the outward path, moves from the turning inner end to the chute, drops the aggregate at the chute, and travels to the turning outer end. , Make a U-turn, and on the return side, run in the reverse direction up to the inside end of the turn,
A chute portion for dropping the aggregate from the laminated conveyor , on a guide rail provided on the frame, in a state where the laminated conveyor is guided by the pulley or the guide roller, a turning inner end side and a turning outer end. That it is designed to travel back and forth between
Almost at the center of rotation, the structure is such that aggregate is supplied onto the laminated conveyor,
Aggregate laminating apparatus characterized by the above-mentioned. It has a sand conveyor for supplying sand on the aggregate conveyor that supplies the aggregate to the center of rotation of the laminated conveyor, and has a function of controlling the amount of sand supplied on the sand conveyor. The apparatus for laminating aggregates according to claim 3, further comprising a sand bottle.

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