JP2014037284A - Yard blending system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce maintenance cost and improve system operating rates, in a yard blending system using two yards adjacent to each other in series.SOLUTION: A yard blending system includes a stacker 20 stackable in both yards, one reclaimer 30a disposed in one yard, and the other reclaimer 30b disposed in the other yard. The reclaimers 30a, 30b each include: a bridge 31 traveling along a rail 92 provided on either side of each yard; a carriage 32 transversely moving along the bridge 31; a bucket wheel 50 rotatably attached to the carriage 32; a harrow 70 projecting from the carriage 32 toward the front of the bridge 31; and an onboard conveyor 60 provided behind the bridge 31.

Description

  The present invention relates to a blending system that performs dispensing in a state where a plurality of types of loose materials are uniformly mixed, and in particular, a yard blending system that alternately performs stacking by a stacker and dispensing by a reclaimer using a yard of two sides. About.

  A system in which a plurality of types of bulk materials are piled up and stacked in a predetermined order in a yard and then discharged in a uniformly mixed state is, for example, iron ore mixing in a steel mill or mixing of coking raw material coal, This is done by blending fuel coal at thermal power plants. Patent Document 1 describes yard blending using a stacker and a reclaimer, which is shown in FIG.

  In the yard blending system 110, a plurality of loose materials are carried into the yard 190 in a predetermined order by the carry-in line 196 and stacked in the yard 190 by the stacker 120. The stacker 120 drops the bulk material in the center of the width direction (hereinafter referred to as “lateral direction”) while reciprocating in the yard 190 in the longitudinal direction (hereinafter referred to as “front-rear direction”). A pile 180 in which a plurality of bulk materials are laminated is formed.

  As shown in FIG. 4 (b), the stack 180 is piled up with a plurality of types of bulk material while the stacker 120 repeats reciprocation. It will be in the laminated state. Even if the position of the cut section is changed in the front-rear direction of the pile 180, substantially the same section state can be obtained.

  The reclaimer 130 is capable of traveling in the front-rear direction of the yard 190 and includes a bucket wheel 150 that rotates near the bottom surface of the pile 180 and scoops up bulk material. The plurality of laminated bulk materials are blended by being cut out from one end of the pile 180, so that the uniformly mixed bulk material is discharged from the discharge line 197.

  As the stacker 120, an apparatus obtained by simplifying a stacker / reclaimer conventionally used can be used. A stacker / reclaimer 220 described in Patent Document 2 is shown in FIG. On one side of the yard 190, a pair of rails 191 are provided in the front-rear direction, and the machine body 221 and the tripper 222 of the stacker / reclaimer 220 each run with wheels. The bulk material carried in by the carry-in line 196 is discharged from the tip of the boom 225 into the yard 190 through the tripper 222, the chute 223, and the boom conveyor 224 while the stacker / reclaimer 220 is traveling. The boom 225 can turn with respect to the airframe 221 and can be lifted.

  An example of the reclaimer described in Patent Document 3 is shown in FIGS. The reclaimer 230 travels in the front-rear direction along rails 192 and 192 provided on both sides of the yard 190. The bridge 231 of the reclaimer 230 is provided with a carriage 232 having two bucket wheels 250 and two halos 270. The carriage 232 can move in the lateral direction along the bridge 231. Therefore, as the carriage 232 traverses, the halo 270 scrapes the end of the pile 180 on average, and the bucket wheel 250 is dropped onto the bottom surface to scoop up the mixed material.

  Then, as shown in the figure, the bucket wheel 250 and the halo 270 are provided at two locations, and the distance between them is substantially half of the lateral width of the pile 180, thereby improving the quantitativeness and uniform mixing property of the bulk material to be carried out. Can do.

  As shown in FIG. 5B, the carriage 232 includes a frame body portion that surrounds the bridge 231, and traverses along a rail 233 provided on the upper surface of the bridge 231. The bucket wheel 250 has a ring shape, and includes buckets 251 on the outer peripheral surface thereof at a predetermined interval. The inner peripheral surface is rotatably supported by a guide roller 259 and is driven by a chain 258. An in-machine conveyor 260 is provided along the bridge 231, and the in-machine conveyor 260 is formed so as to penetrate the bucket wheel 250 together with the bridge 231.

  The bulk material picked up by the bucket 251 is naturally dropped from the bucket 251 when the bucket 251 is reversed upward as the bucket wheel 250 rotates, and is transferred onto the in-machine conveyor 260 via the chute 257. Further, the bulk material is transferred from the in-machine conveyor 260 to a carry-out line 197 shown in FIG. 4A and is carried out from here to a use facility.

  The two halos 270 are provided so as to protrude from the carriage 232 toward the end of the pile 180. In addition, a plurality of claws 271 are provided on the lower surface of the protruding halo 270 so that each claw 271 pierces the cut slope of the pile 180 at substantially the same depth. That is, each halo 270 can be lifted to an angle corresponding to the angle of repose of the bulk material.

  A yard blending system is usually configured using two adjacent yards. The two adjacent yards are called “yard A” and “yard B”, and the piles formed in the respective yards are called “pile A” and “pile B”. The yard A and the yard B are considered to be parallel in the case of being adjacent in parallel or in the case of being in series adjacent to each other in a straight line. In the case of parallel, a turnable stacker is arranged between the yards AB and dedicated reclaimers are arranged in the yards A and B, respectively, or a reclaimer capable of raising and lowering is arranged between the yards AB, Dedicated stackers are placed in A and Yard B, respectively.

  When two yards are in series, a system configuration using one stacker and one reclaimer has been conventionally employed. The yard blending system 110 will be described with reference to FIG. In FIG. 6A, in Yard B, the stacker 120 reciprocates in the front-rear direction (left-right direction in the figure), piles the bulk material loaded from the loading line 196 to form the pile B, and in Yard A The reclaimer 130 breaks the pile A in the direction away from the yard B (the left direction in the figure), and the bulk material is carried out from the carry-out line 197. In FIG. 6B, the stacker 120 is reciprocating back and forth in the yard A to form the pile A. In the yard B, the reclaimer 130 is piled in a direction away from the yard A (right direction in the figure). B is broken down and the bulk material is taken out. Then, the state of FIG. 6A and the state of FIG. 6B are alternately repeated.

  Since the reclaimer 130 travels in one direction in FIG. 6A and travels in the other direction in FIG. 6B, the reclaimer 230 shown in FIG. 5 cannot be used as it is. However, Patent Document 4 describes a reclaimer capable of working in both directions by reversing the direction of the bucket, and Patent Document 5 describes a reclaimer having halos in both directions. Therefore, by adopting these functions in the reclaimer 230 shown in FIG. 5, the reclaimer 130 capable of performing the operations shown in FIGS. 6 (a) and 6 (b) can be obtained.

  Since the yard blending system 110 can be composed of one stacker 120 and one reclaimer 130, it can be a simple system. However, the reclaimer 130, like the reclaimer 230 of FIG. 5, is a type in which the bridge and the in-machine conveyor pass through the bucket wheel. Therefore, the reclaimer 130 is difficult to adjust and requires frequent maintenance. Has the problem of low.

That is, in order to attach the bucket wheel 250 to the bridge 231 in the reclaimer 230 of FIG. 5, the bucket wheel 250 divided into a plurality of parts is assembled on site. Assembling a huge rotating body on site is a very difficult task.
Also, the bulk material is transferred from the inverted bucket 251 to the in-machine conveyor 260 via the chute 257, but it is not possible to completely prevent the bulk material from spilling. Since the bucket wheel 250 is supported by a plurality of guide rollers 259, the spilled material enters between the guide roller 259 and the ring-shaped rail, causing wear, and it is necessary to replace these parts. Accordingly, parts that are difficult to adjust are frequently replaced, resulting in an increase in maintenance costs and a reduction in operating time.
Furthermore, since there is a high possibility that unexpected troubles will occur with respect to the traverse of the carriage 232, a support facility for stocking a large amount of blended material is required to deal with these troubles.

Japanese Patent Laid-Open No. 57-112237 JP 2001-58725 A JP 2000-327133 A JP 2004-26461 A JP 2009-120286 A

  Therefore, an object of the present invention is to provide a system that realizes an improvement in system operation rate and a reduction in maintenance costs in a yard blending system in the case where two yards are adjacent in series. It is another object of the present invention to provide a system that does not require difficult adjustments, and to provide a system that is highly reliable and does not require support facilities.

  As a result of researches to improve the series yard blending system, the present inventors have deployed a dedicated reclaimer in each yard, and each reclaimer has a type in which the bridge and the in-machine conveyor do not penetrate the bucket wheel. As a result, although the equipment cost increased somewhat, it was found that the system operating rate can be improved and the maintenance cost can be reduced, and the present invention has been completed.

  A yard blending system according to claim 1 of the present invention is a yard blending system that alternately performs stacking by a stacker and dispensing by a reclaimer in two yards adjacent to each other in series, and can be loaded in both yards. One stacker, one reclaimer arranged in one yard, and the other reclaimer arranged in the other yard, each reclaimer traveling along a rail provided on both sides of each yard Bridge, a carriage traversing along the bridge, a bucket wheel rotatably attached to the carriage, a halo projecting from the carriage toward the front of the bridge, and an in-machine conveyor provided behind the bridge A means comprising the above is adopted.

  A yard blending system according to claim 2 of the present invention is the yard blending system according to claim 1, wherein the one reclaimer in the one yard is from the side far from the other yard. The other reclaimer is arranged so as to pay out toward the one yard from the side farther from the one yard in the other yard. Is adopted. A yard blending system according to claim 3 of the present invention is the yard blending system according to claim 1 or 2, wherein the bucket wheel is provided by a reduction gear and an electric motor provided on the same axis as the bucket wheel. Adopting the driven means.

  Since the yard blending system according to the present invention has the above-described configuration, the bucket wheel assembled in the factory can be attached to the carriage at the work site, so that the work at the work site is made easy. Can do. In addition, even if the loose material is spilled, it is not related to the rotation of the bucket wheel, and it is not necessary to frequently exchange parts. Therefore, a reduction in maintenance cost and an improvement in operating time can be realized, and a highly reliable system can be obtained.

It is explanatory drawing which shows the yard blending system of this invention, and shows that the state of (a) and the state of (b) are repeated alternately. The reclaimer which comprises the system of this invention is shown, (a) is a schematic front view, (b) is a schematic plan view. 2 is a partial schematic cross-sectional view of the reclaimer of FIG. 2, wherein (a) is a cross-sectional view taken along the line XX of FIG. 2 (a), and (b) is a cross-sectional view taken along the line Y-Y of FIG. It is. (A) is explanatory drawing which shows the outline | summary of the conventional yard blending, (b) is explanatory drawing which shows the cross section of a pile, (c) is the schematic which shows the conventional stacker reclaimer. The conventional reclaimer is shown, (a) is a schematic front view, (b) is a schematic sectional drawing of the ZZ arrow of (a). It is explanatory drawing which shows the conventional yard blending system and shows that the state of (a) and the state of (b) are repeated alternately.

  The yard blending system 10 of the present invention will be described with reference to FIG. The yard blending system 10 of the present invention is arranged in two yards (yard A, yard B) adjacent in series, one stacker 20 that can be stacked on both yards, and one yard (yard A). One reclaimer 30a and the other reclaimer 30b arranged in the other yard (yard B).

  Each reclaimer 30a, 30b can be arranged on either side in the longitudinal direction (front-rear direction) of each yard, but in FIG. 1, one reclaimer 30a is in one yard from the side far from the other yard. It arrange | positions so that it may pay out toward the other yard, and the other reclaimer 30b is arrange | positioned so that it may pay out toward the one yard from the side far from one yard in the other yard. And both the reclaimers 30a and 30b cannot pay out in the opposite direction.

  In FIG. 1A, in the yard B, the stacker 20 reciprocates in the front-rear direction (left-right direction in the figure), and piles of bulk materials loaded from the carry-in line 96 form the pile B. Further, in the yard A, the reclaimer 30 a breaks the pile A from the side far from the yard B toward the yard B, and carries the bulk material from the carry-out line 97. At this time, the reclaimer 30b is in a standby state at the end of the yard B.

  In FIG. 1B, in the yard A, the stacker 20 reciprocates in the front-rear direction (left-right direction in the figure), and pile materials loaded from the carry-in line 96 are piled up to form the pile A. Further, in the yard B, the reclaimer 30 b breaks the pile B from the side far from the yard A toward the yard A, and carries the bulk material from the carry-out line 97. At this time, the reclaimer 30a is in a standby state at the end of the yard A. And the state of Fig.1 (a) and the state of FIG.1 (b) are performed repeatedly alternately.

  Conventional techniques can be used for the carry-in line 96, the carry-out line 97, and the stacker 20. The yard blending system 10 of the present invention uses two reclaimers 30a and 30b to drastically eliminate the problems of the reclaimer that could not be avoided in the past, and has the structure of the reclaimers 30a and 30b. It has great features. FIG. 2A shows a front view of the reclaimer 30, and FIG. 2B shows a plan view.

  The reclaimer 30 is provided with a bridge 31 so as to straddle the yard 90, and travels in the front-rear direction along rails 92, 92 provided on both sides of the yard 90. The bridge 31 is provided with a carriage 32 so as to be suspended from the bridge 31, and the carriage 32 can traverse along the bridge 31. The carriage 32 is provided with two bucket wheels 50 and two halos 70, and the two bucket wheels 50 and the two halos 70 traverse as the carriage 32 traverses.

  The two halos 70 scrape the bulk material stacked on the ends of the pile on average, and the two bucket wheels 50 scoop up the bulk material dropped near the bottom of the yard 90 by rotation. . The bulk material that has been scooped up is transferred to the carry-out line 97 (belt conveyor) via the feed conveyor 40 and the in-machine conveyor 60, and is carried out to the use facility.

  In the reclaimer 30, two bucket wheels 50 are located in the vicinity immediately below the bridge 31. Further, the two halos 70 are provided only on the side (front side) in the direction of advancement during work. An in-machine conveyor 60 is provided on the side (rear side) opposite to the hello 70. With such an arrangement, the bridge 31 and the in-machine conveyor 60 do not penetrate the bucket wheel 50, that is, a structure that does not require a guide roller.

  Such a structure of the reclaimer 30 is made possible by arranging the reclaimer 30a and the reclaimer 30b in the yard A and the yard B adjacent in series, respectively. As shown in FIG. 6, when a single reclaimer is used, the reclaimer 130 needs to be provided with halos in both the front and rear directions. Therefore, it is impossible to realize the structure of the reclaimer 30 of the present invention. The reclaimer 30 of the present invention will be further described with reference to FIGS.

  As shown in FIG. 3A, the carriage 32 includes wheels 35 and travels on the upper surface of the bridge 31 while being suspended from the bridge 31. As a method for driving the carriage 32, for example, a drive motor 36 can be arranged on the carriage 32, and a pinion gear provided on the drive shaft can be engaged with a rack provided on the bridge 31 for driving.

  The bucket wheel 50 has a structure in which the bridge 31 and the in-machine conveyor 60 do not pass through the inside thereof, so that the degree of freedom of attachment increases, and the bucket wheel 50 is rotatably attached to the attachment portion 39 provided at the end portion of the carriage 32. The bucket wheel 50 includes a central portion 52 (boss), an outer peripheral portion 53, spokes 54 connecting the central portion 52 and the outer peripheral portion 53, and a plurality of buckets 51 provided outside the outer peripheral portion 53. It is rotated by a drive unit 55 provided on the axis.

  The outer peripheral portion 53 does not necessarily need to use a ring-shaped member, and can be formed in a polygonal shape with a rod-shaped member. By using the rod-shaped member to form the outer peripheral portion 53 and the spoke 54, a structure in which the loose material is less likely to adhere and grow can be obtained. In addition, the drive unit 55 can be a combination of an electric motor and a speed reducer that is directly connected to the drive shaft. For this reason, it is possible to form the drive unit 55 in a compact manner, and it is less likely to be adversely affected by wear or the like due to adhesion of loose material, and a structure requiring little maintenance can be achieved. It should be noted that the position of the bearing can be provided at the attachment portion 39 or at the central portion 52.

  The bulk material is averagely scraped off from the end of the pile by the traversing of the hello 70 including the claws 71 and is mixed up, and is swung up on the bottom surface of the yard 90 by the rotation of the bucket wheel 50. The bulk material picked up by the bucket 51 is naturally dropped from the bucket 51 when the bucket 51 reverses upward as the bucket wheel 50 rotates, and is transferred to the feed conveyor 40 via the chute 41. Further, the bulk material is transferred to the carry-out line 97 via the in-machine conveyor 60, and is carried out from here to the use facility.

As described above, in the yard blending system 10 of the present invention, by arranging the reclaimers 30a and 30b in each of two adjacent yards, it becomes a system that does not make difficult adjustments as in the past, and the frequency of maintenance is reduced. Therefore, the system can be made highly reliable.
The halo 70 can be lifted by a winch or the like, and the claw 71 is pierced at a uniform depth with respect to the slope of the pile by adjusting the angle according to the angle of repose of the bulk material. .

10: Yard blending system 20: Stacker 30a, 30b: Reclaimer 31: Bridge 32: Carriage 60: In-machine conveyor 70: Halo 92: Rail

Claims (3)

A yard blending system that alternately performs stacking with a stacker and paying out with a reclaimer in two adjacent yards in series,
One stacker that can be stacked in both yards, one reclaimer arranged in one yard, and the other reclaimer arranged in the other yard,
Each reclaimer includes a bridge that travels along a rail provided on both sides of each yard, a carriage that traverses along the bridge, a bucket wheel that is rotatably attached to the carriage, and a front side of the bridge. A yard blending system comprising a harrow protruding from the carriage and an in-machine conveyor provided behind the bridge. The one reclaimer is disposed so as to pay out from the side farther from the other yard toward the other yard in the one yard;
2. The yard blending system according to claim 1, wherein the other reclaimer is disposed so as to perform payout from the side farther from the one yard toward the one yard in the other yard. .   The yard blending system according to claim 1 or 2, wherein the bucket wheel is driven by a speed reducer and an electric motor provided on the same axis as the bucket wheel.