JP2015016955A - Dropped ore recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dropped ore recovery device that dispenses with a recovery operation of the device by preventing the occurrence of overload stop of the device by reducing a load imposed on the device.SOLUTION: A dropped ore recovery device recovers dropped ore, which is dropped from a belt conveyor for conveying a loose bulk material, by scraping off the dropped ore by a plate-like scraper attached to an endless conveyor chain 11. A comb-like scraper 13, in which protrusions 13b for leveling deposit comprising the dropped ore accumulated in the rear of the conveyor chain 11 are implanted like a teeth of a comb, is attached to the conveyor chain 11.

Description

  The present invention relates to a falling ore recovery apparatus that recovers falling ore falling from a belt conveyor that conveys bulk materials.

  In the belt conveyor that conveys loose materials such as ore to which the adhesive fine-grained powder adheres, the upper surface of the forward belt on which the bulk material is placed becomes the lower surface in the return belt after dropping the bulk material. A relatively large amount of fine-grained powder that did not fall when dropping the bulk material adheres to the lower surface of the return belt. The fine powder adhering to the belt surface may fall in the middle of the return path, causing equipment contamination.

  As a countermeasure, a cleaning device such as a scraper or cleaner is installed in the vicinity of the head pulley overhanging the bulk material inlet, and a scraping member made of brush, rubber, metal, etc. is applied to the belt surface at a constant pressure. It is widely performed that the fine particles adhering to the belt surface are scraped off by contacting with each other. In this method, it is necessary to press the belt cleaner against the conveyor belt at the head pulley portion because the finely divided powder that has been scraped off must be dropped into the inlet. However, since the head pulley overhangs on the input port, it is difficult to adjust the pressing force for pressing the belt cleaner against the conveyor belt at the head pulley portion, and there is a problem that fine powder cannot be removed sufficiently.

Therefore, in Patent Document 1, a belt cleaner that is pressed against the lower surface of the return belt on the head pulley side excluding a portion overhanging on the inlet, a pressing roller that presses the return belt on the head pulley side from above, A belt conveyor is disclosed that includes recovery dropping means (falling ore recovery device) that recovers falling particulate powder scraped off by a belt cleaner and drops it to an inlet. In the belt conveyor described in Patent Document 1, the belt pulley is pressed against the dirt surface while pressing the return belt from above with a pressing roller at the belt conveyor part that is not overhanging, and the particle dust is scraped off. Even with a belt conveyor overhanging on the mouth, the dirty surface can be cleaned well. As a result, not only can the amount of fallen powder falling from the return belt to the floor surface be reduced, but the scraped powder can be recovered by the recovery dropping means and dropped to the inlet.
“Rose such as ore to which adhesive fine-grained powder is attached” means iron ore, non-ferrous ore, limestone, and crushed stone used for civil engineering and construction is there.

Japanese Utility Model Publication No. 7-40628

  The conventional falling ore recovery apparatus as described in Patent Document 1 scrapes the falling ore 30 that has fallen into the apparatus with a plurality of plate-shaped scrapers 12 mounted on the conveyor chain 11 and from the head side to the outside of the apparatus. (See FIG. 7), the fallen ore 30 that contains moisture and is made viscous is carried to the tail side while adhering to the plate scraper 12. Further, the falling ore 30 that has fallen to the bottom of the recovery case 14 may not be completely discharged and may be carried to the tail side while attached to the plate scraper 12.

  The falling ore 30 adhering to the plate-shaped scraper 12 falls and accumulates behind the tail shaft 18 when the plate-shaped scraper 12 is reversed as the tail shaft 18 rotates, and is scraped by the subsequent plate-shaped scraper 12. And pressed. The load applied to the falling ore recovery device caused by the plate-shaped scraper 12 coming into contact with the deposit 31 firmly grown by the above action is absorbed using the slackness of the conveyor chain 11. However, if the growth of the deposit 31 exceeds the load absorption limit due to the slack of the conveyor chain 11, the contact area between the deposit 31 and the plate-shaped scraper 12 increases, and the load applied to the falling ore recovery device becomes excessive. An overload stop of the ore recovery device occurs.

  In order to recover the falling ore recovery apparatus that has been overloaded, it is necessary to replace the plate-shaped scraper 12 that has been bent due to overload after cleaning the interior of the apparatus with water. The replacement work of the plate-shaped scraper 12 must be performed in a narrow and slippery apparatus, and involves a risk of being pinched by a member or falling over.

  The present invention has been made in view of such circumstances, and provides a falling ore recovery apparatus that reduces the load on the apparatus so that the apparatus is not overloaded and thus does not require the apparatus to be restored. For the purpose.

In order to achieve the above object, the present invention provides a falling ore recovery apparatus for scraping and recovering falling ore falling from a belt conveyor that conveys bulk materials with a plate scraper attached to an endless conveyor chain.
A comb-tooth scraper, in which protrusions for breaking down deposits made of falling ore deposited behind the conveyor chain are planted in a comb-teeth shape, is mounted on the conveyor chain.

  In the falling ore recovery apparatus according to the present invention, as shown in FIG. 2, the deposit 31 made of falling ore 30 deposited behind the conveyor chain 11 (behind the tail shaft 18) interferes with the plate scraper 12. The region 32 is cut and removed by the comb scraper 13 attached to the conveyor chain 11. Thereby, the contact area between the deposit 31 and the plate scraper 12 is reduced, and the load on the falling ore recovery device when the plate scraper 12 is reversed due to the rotation of the tail shaft 18 can be reduced.

  In the falling ore recovery apparatus according to the present invention, the deposit made of falling ore deposited behind the conveyor chain is cut by a comb-tooth scraper, so the load on the falling ore recovery apparatus is reduced and the falling ore recovery apparatus is overloaded and stopped. There is nothing to do. For this reason, it is not necessary to perform a recovery work of the falling ore recovery device with a high risk.

It is a schematic diagram of the conveyance installation in which the falling-mine collection apparatus which concerns on one embodiment of this invention is installed. It is a schematic diagram for demonstrating the operation | movement of the comb-tooth scraper with which the falling ore collection | recovery apparatus is equipped. It is sectional drawing at the time of cut | disconnecting the falling-mine collection apparatus in the position of a comb-tooth scraper. It is sectional drawing at the time of cut | disconnecting the same falling ore recovery apparatus in the position of a plate-shaped scraper. It is a perspective view of a comb-tooth scraper. It is a perspective view of a plate-shaped scraper. It is a schematic diagram for demonstrating operation | movement of the conventional falling-over recovery apparatus.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

  FIG. 1 shows a transport facility in which a falling ore recovery apparatus 10 according to an embodiment of the present invention is installed. In this specification, regarding the falling ore recovery apparatus 10 and the belt conveyor 20, the side on which the bulk material is dropped is the “head” side or “front” side, and the opposite side is the “tail” side or “rear” side Call.

  This transport facility is a facility for transporting loose materials such as iron making raw materials, and includes a belt conveyor 20 that transports bulk materials, a falling ore recovery device 10 that recovers falling ore falling from the belt conveyor 20, and a belt conveyor 20. A succeeding belt conveyor 21 that conveys the conveyed bulk material in a direction orthogonal to the belt conveyor 20 is provided.

  The belt conveyor 20 that conveys bulk material is an endless conveyor belt 23 that is stretched between a head pulley 22 disposed on the bulk material discharge side and a tail pulley (not shown) disposed on the bulk material supply side. It has. The conveyor belt 23 located on the upper side becomes the forward belt 24 for conveying the bulk material, and the conveyor belt 23 located on the lower side becomes the return belt 25 after dropping the bulk material. A snap pulley 27 that adjusts the winding angle of the head pulley 22 by pushing up the return belt 25 is installed on the return belt 25 in the vicinity of the head pulley 22. Even if the head pulley 22 rotates, the conveyor belt 23 may slip and idle, so the snap pulley 27 is used to increase the winding angle of the head pulley 22.

  A plurality of belt cleaners 26 are installed on the circumference of the head pulley 22 and in the vicinity of the snap pulley 27 to scrape off the fine particles adhering to the conveyor belt 23 without dropping when the loose material is dropped. The fine-grained powder scraped off by the belt cleaner 26 is recovered by the falling ore recovery device 10 described later.

  In order to prevent powder scattering when dropping ore dropping, the head pulley 22, the snap pulley 27, and the belt cleaner 26 are covered with a shield case 28a, and a chute 28 is integrally attached to the lower part of the shield case 28a. . Bulk material dropped from the belt conveyor 20 is transferred to the succeeding belt conveyor 21 through a charging port 28 b formed at the lower end of the chute 28.

The falling ore recovery device 10 is installed below the belt conveyor 20 along the belt conveyor 20, and the front half is inserted into the chute 28 in a state where the head side is inclined downward (or in a horizontal state). Yes.
The falling-off recovery device 10 includes an endless conveyor chain 11 on which a plate-shaped scraper 12 is mounted. The falling-down mineral falling from the belt conveyor 20 is collected by the plate-shaped scraper 12 and dropped into the input port 28b.
Furthermore, in the present embodiment, a comb-tooth scraper 13 for cutting a deposit made of falling ore deposited behind the conveyor chain 11 is attached to the conveyor chain 11.

  The endless conveyor chain 11 is bridged between a pair of sprockets 15 mounted on both ends of the head shaft 17 and a pair of sprockets 16 mounted on both ends of the tail shaft 18 (FIG. 3). FIG. 4). In the present embodiment, the head shaft 17 is a drive shaft, the tail shaft 18 is a driven shaft, and an electric motor with a reduction gear (not shown) is connected to the head shaft 17.

  A recovery case 14 that opens upward and serves as a tray for falling ore falling from the belt conveyor 20 is installed at the bottom of the falling ore recovery apparatus 10. Further, a guide plate 19 that serves as a guide when dropping the falling ore scraped by the plate-shaped scraper 12 to the charging port 28b is provided immediately below the head shaft 17.

The plate-shaped scrapers 12 that scrape the falling ore are mounted on the conveyor chain 11 at a predetermined pitch (six in this embodiment). 4 and 6 show the shape of the plate scraper 12. The plate-like scraper 12 includes a belt-like horizontal member 12a installed between a pair of conveyor chains 11 arranged in parallel, and a belt-like member protruding from one surface along the longitudinal direction of the horizontal member 12a. Scraping material 12b. In addition, attachment portions 12c for attaching the plate scraper 12 to the conveyor chain 11 are provided at both ends in the longitudinal direction of the other surface of the horizontal member 12a.
When the plate scraper 12 is attached to the conveyor chain 11, a bolt (not shown) is inserted into a hole formed in the attachment portion 12c and fixed to the conveyor chain 11 with a shackle 29 (see FIG. 4).

A comb-shaped scraper 13 that cuts deposits made of falling ore deposited behind the conveyor chain 11 is mounted on the conveyor chain 11 between the plate-shaped scraper 12 and the plate-shaped scraper 12 (total 2 in this embodiment). Group). The shape of the comb-tooth scraper 13 is shown in FIGS. The comb-tooth scraper 13 is a strip-like horizontal member 13a installed between a pair of conveyor chains 11 arranged in parallel, and protrudes from one surface of the horizontal member 13a, and has a plurality of comb-like shapes. And a protrusion 13b. In addition, attachment portions 13c for attaching the comb-tooth scraper 13 to the conveyor chain 11 are provided at both longitudinal ends of the other surface of the horizontal member 13a, and reinforcing ribs 13d are provided between the pair of attachment portions 13c. Is formed.
When the comb-tooth scraper 13 is attached to the conveyor chain 11, a bolt (not shown) is inserted into a hole formed in the attachment portion 13c and fixed to the conveyor chain 11 with a shackle 29 (see FIG. 3). reference).

  The height of the protrusion 13b is preferably higher than the height of the scraping material 12b. The shape of the protrusion 13b is not particularly limited, and a round bar or a square bar may be used. Furthermore, the number of the comb-tooth scrapers 13, the material of the protrusions 13b, the interval between the protrusions 13b, and the like are not particularly limited, and may be appropriately determined according to the deposit.

Next, the operation of the falling ore recovery apparatus 10 will be described.
Bulk materials such as iron-making materials supplied to the tail side of the forward belt 24 of the belt conveyor 20 are conveyed to the head pulley 22 by the forward belt 24 and dropped onto the chute 28. The bulk material dropped on the chute 28 is dropped on the subsequent belt conveyor 21 through the insertion port 28b, and is conveyed by the subsequent belt conveyor 21 in a direction orthogonal to the belt conveyor 20.

  Fine powder adhering to the conveyor belt 23 after dropping the bulk material is scraped off by a belt cleaner 26 installed on the circumference of the head pulley 22 and in the vicinity of the snap pulley 27. The fine-grained powder (mining) scraped off by the belt cleaner 26 falls onto the recovery case 14 of the falling ore recovery device 10 disposed below the belt conveyor 20. Falling ore falling on the recovery case 14 is scraped and collected by the plate-shaped scraper 12 that is mounted on the conveyor chain 11 and circulates, and is dropped onto the chute 28 from the head side of the falling ore recovery device 10.

  On the other hand, the falling ore deposited on the plate scraper 12 falls and accumulates behind the tail shaft 18 when the plate scraper 12 is reversed as the tail shaft 18 rotates. Deposits made of falling ore deposited behind the conveyor chain 11 are cut into the protrusions 13b of the comb-shaped scraper 13 that is attached to the conveyor chain 11 and circulates. The fallen falling ore is scraped and collected by the plate scraper 12 and dropped onto the chute 28 from the head side of the falling ore recovery apparatus 10.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and is within the scope of matters described in the claims. Other possible embodiments and modifications are also included. For example, in the above-described embodiment, the falling ore recovery device is disposed below the head side of the overhanging belt conveyor, but the falling ore recovery device is provided below the connecting portion of the two belt conveyors arranged orthogonally. You may arrange. Moreover, in the said embodiment, although the protrusion of the comb-tooth scraper is arrange | positioned at 1 row, it is good also as 2 or more rows. Furthermore, in the said embodiment, although the plate-shaped scraper and the comb-tooth scraper are attached to the conveyor chain using the shackle, it is not limited to this, Other methods may be used.

10: Falling ore recovery device, 11: Conveyor chain, 12: Plate scraper, 13: Comb scraper, 12a, 13a: Horizontal member, 12b: Scraping material, 13b: Protrusion, 12c, 13c: Mounting part, 13d : Rib, 14: Collection case, 15, 16: Sprocket, 17: Head shaft, 18: Tail shaft, 19: Guide plate, 20: Belt conveyor, 21: Subsequent belt conveyor, 22: Head pulley, 23: Conveyor belt, 24: Outward belt, 25: Return belt, 26: Belt cleaner, 27: Snap pulley, 28: Chute, 28a: Shield case, 28b: Loading port, 29: Shackle, 30: Mining, 31: Sediment, 32: Interference area

Claims (1)

In a falling ore recovery device that scrapes and collects falling ore falling from a belt conveyor that transports bulk materials with a plate scraper attached to an endless conveyor chain,
A falling ore recovery apparatus, wherein a comb-tooth scraper in which protrusions for breaking down deposits of falling ore deposited on the rear side of the conveyor chain are planted in a comb shape is mounted on the conveyor chain.

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