JP5274137B2 - Granular object dispensing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a delivery device for delivering granular substances such as coal in which a hard-to-wear material which is easily available and does not tend to fall is provided to a scraper. <P>SOLUTION: This delivery device delivers a granular substance from a conveyor to a hopper disposed under the conveyor by the conveyor 13. The delivery device includes a scraper device. The scraper device includes a plate-shaped delivery body extending toward the conveyor side. A ceramic part is attached to at least the front end of the delivery body. The delivery body is driven in the direction crossing the conveying direction of the conveyor to deliver the granular substance on the conveyor to the hopper. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a granular object dispensing apparatus that dispenses granular objects conveyed on a conveyor, and more particularly, to a loaded cargo dispensing apparatus for dispensing coal, which is a granular object being conveyed on a conveyor using a scraper, to a hopper.

  Generally, in a thermal power plant using coal as fuel, coal is transported from a coal storage station to a hopper by a belt conveyor (coal bunker conveyor), and the coal is temporarily stored in the hopper (for example, the hopper is provided for each boiler). Provided). A scraper is used when paying out the coal being conveyed on the conveyor to the hopper. For example, the scraper is driven in a direction crossing the coal conveying direction so that the coal on the conveyor is discharged to the hopper. Yes.

In such a coal dispensing device, when the coal transported by the conveyor is crossed by a scraper disposed above the conveyor, and the coal is put into a hopper disposed below the conveyor, both sides of the conveyor belt are raised. The transport surface of the trough structure transports coal, and when discharging, the conveyor belt transport surface is flattened by a movable roller, the scraper is lowered, the scraper bottom is brought close to the conveyor belt transport surface, and the scraper surface is transported. There is one in which a transported object is guided to the outside by being made to intersect with an object (see, for example, Patent Document 1).
JP-A-10-236543

  By the way, in the above coal delivery device, when the coal on the conveyor belt is delivered to the hopper, the tip of the scraper delivery body (payout plate) is close to the surface of the conveyor belt (for example, the interval is Since the discharging body is driven in a direction crossing the transport direction to discharge the coal to the hopper, the discharging body inevitably comes into contact with the coal. For this reason, a so-called carbide tip, which is a hard-wearing material, is attached to the tip of the payout body.

  The above-mentioned cemented carbide chip is sandwiched between plates in the payout body, but it is difficult to attach it, it is difficult to obtain a desired clamping force, and the cemented carbide chip may fall off. When the cemented carbide chip falls off, trouble may occur in the coal feeder and the scraper itself, and it is necessary to avoid such a situation.

  Furthermore, when a new cemented carbide chip is delivered, a delivery time of at least about 30 days is required, and there is a possibility that coal cannot be discharged until the delivery date of the cemented carbide chip. That is, there is a problem that it becomes difficult to cope with non-conformity such as when the cemented carbide chip is dropped.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a granular object dispensing device including a hard-wearing material that is easily available and difficult to fall off.

  (1) The present invention has a scraper device disposed above the conveyor in a granular object dispensing device that dispenses a granular object from the conveyor to a storage unit disposed below the conveyor. The scraper device has a plate-like dispensing body extending toward the conveyor side, and a ceramic portion is mounted on at least the tip side of the dispensing body, and the dispensing body intersects with the conveying direction of the conveyor. And the granular object on the conveyor is dispensed to the storage section.

  In the granular object dispensing apparatus described in (1), since the ceramic portion is mounted on at least the front end side of the plate-shaped dispensing body of the scraper device, wear of the dispensing body due to friction with the granular object is appropriately prevented. Moreover, since ceramics are easily available, their repair is easy.

  (2) The granular object dispensing device according to (1), wherein the dispensing member is sandwiched between a housing and a pressing member of the scraper device and fixed by a bolt. is there.

  In the granular object dispensing apparatus according to (2), the plate-shaped dispensing body itself is used as a member for dispensing the granular object, and the dispensing body is sandwiched between the casing and the pressing member of the scraper device and fixed with bolts. As a result, the payout body will not fall off.

  (3) According to the present invention, in the granular object dispensing apparatus according to (1) or (2), a plurality of ceramic pieces are attached to the dispensing body, and the ceramic portion is formed by these ceramic pieces. It is characterized by.

  In the granular object dispensing apparatus described in (3), since the ceramic part is formed by attaching a plurality of ceramic pieces to the dispensing body, and the ceramic part is formed by these ceramic pieces, it is very easy to attach the ceramic part to the dispensing body. It becomes.

  (4) The present invention provides the granular object dispensing apparatus according to (3), wherein a plurality of holes are formed in the dispensing body, and holes are formed in the ceramic piece in advance. A bolt is inserted into the hole portion in a state where the hole portion and the hole portion of the ceramic piece are combined, and the ceramic piece is attached to the dispensing body with the bolt.

  In the granular object dispensing apparatus according to (4), since the ceramic piece is attached to the dispensing body with bolts in a state where the hole portion of the dispensing body and the hole portion of the ceramic piece are combined, the ceramic piece can be easily attached. Can be attached to the payout body.

  (5) In the granular object dispensing device according to any one of (1) to (4), the present invention is characterized in that the granular object is coal.

  In the granular object dispensing apparatus according to (5), since the granular object is coal, the coal can be efficiently dispensed at a coal-fired power plant or the like.

  As described above, according to the present invention, since the ceramic portion is mounted on at least the front end side of the plate-like dispensing body of the scraper device, the wear of the dispensing body due to friction with a granular object such as coal can be appropriately maintained. In addition, since ceramic is easily available, there is an effect that its repair is easy.

  Hereinafter, a granular object dispensing apparatus according to an embodiment of the present invention will be described by taking as an example a coal dispensing apparatus that dispenses coal from a coal storage to a hopper in a thermal power plant.

  FIG. 1 is a diagram of an example of a coal dispensing device according to the present embodiment as viewed from above, and FIG. 2 is a diagram of an example of a coal dispensing device according to the present embodiment as viewed from the side. 3 is a cross-sectional view taken along line AA in FIG. 2 (cross-sectional view of the scraper device), FIG. 4 is a cross-sectional view taken along line BB in FIG. 2, and FIG. 5 is a cross-sectional view taken along line CC in FIG. is there. 6 is a partially broken view of the scraper device as viewed from above, FIG. 7 is a partially broken view of the scraper device as viewed from the side, FIG. 8 is a sectional view taken along the line DD in FIG. 9 is a diagram showing in detail a part of the payout body of the scraper device.

  1, 2, 4, and 5, the conveyor (call bunker conveyor) device 11 includes, for example, seven scraper devices 12, and these scraper devices 12 are transported in the conveyor 13 (in the drawing). (Direction indicated by solid line arrows). Then, these seven scraper devices 12 are selectively driven by control from a command room (not shown), and the coal conveyed on the conveyor 13 is discharged to the hopper 14 (in the example shown, the conveyor 13 A total of four hoppers 14 are arranged on the lower side).

  The illustrated conveyor 13 has a conveyor belt 15, and the conveyor belt 15 is supported by a large number of carry rollers 16 arranged along the conveying direction. An electric motor 17 is disposed at one end portion (left end portion in FIG. 2) of the conveyor 13, and a rotating shaft of the electric motor 17 is connected to a sprocket 19 attached to a driving roller (driving pulley) 21 by a roller chain 18. Therefore, the conveyor belt 15 can be driven in the transport direction by the rotational drive of the electric motor 17.

  The conveyor 13 conveys coal by the conveyor belt 15, and the coal sequentially conveyed by the conveying means (not shown) from the coal storage (not shown) is finally sent to the conveyor 13. Then, coal is sequentially conveyed from one end side of the conveyor 13 and is discharged to the hopper 14 by the scraper device 12 as described later.

  Coal remaining on the conveyor belt 15 (that is, not discharged) is collected by a supply chute 20 disposed on the other end (right end in FIG. 2) side of the conveyor 13. The conveyor belt 15 is stretched between a driving roller 21 and a tail roller (tail pulley) 22 disposed in the vicinity of the supply chute 20.

  Referring to FIGS. 3, 6, and 7, the scraper device 12 has a device housing 30, and a conveyor 13 (conveyor belt 15) is disposed through the device housing 30. The scraper device 12 has a dispensing body (scraper unit) 31, and a ceramic material is attached to the dispensing body 31 as described later.

  As shown in FIG. 6, the payout body 31 has a pair of thin plates 31a, and these thin plates 31a are arranged at a predetermined interval in a direction crossing the conveying direction of the conveyor belt 15, and are connected by a shaft member 31b. Has been.

  As shown in FIGS. 3 and 7, the tip of the thin plate 31a is located slightly above the conveyor belt 15, that is, a predetermined gap is formed between the thin plate 31a and the surface of the conveyor belt 15. Yes. A support portion 32 is formed on the upper surface side of the payout body 31, and a link member 33 is attached to the support portion 32 so as to be rotatable.

  In FIG. 7, a connecting portion 34 is formed at the upper end of the link member 33, and this connecting portion 34 is disposed on a support portion 35 provided in the apparatus housing 30. Further, an arm member 36 is attached to the connecting portion 34, and the arm member 36 is connected to a power cylinder device 37. When the power cylinder device 37 is driven, the arm member 36 moves, whereby the payout body 31 moves in the direction from the front side to the back side of the paper surface in FIG. Pay out to 14.

  Liner bodies 38 provided in the apparatus housing 30 are respectively positioned on both sides of the conveyor 13, and the liner bodies 38 move the conveyor belt 15 from the upper side to the lower side on both sides of the conveyor 13 as shown in FIG. 7. It extends downward so as to cross. The liner body 38 includes a ceramic liner 38a and a polymer resin liner 38b, and prevents coal from spilling from the conveyor belt 15.

  As described above, the dispensing body 31 has a pair of thin plates 31a. The thin plates 31a are attached to the apparatus housing 30 by the holder 40 as shown in FIG. That is, the apparatus housing 30 is provided with a plate-like thin plate support 41, while the holder 40 has a pressing member 42 and a bolt 43. The thin plate 31 a is sandwiched between the thin plate support 41 and the pressing member 42, and the thin plate 31 a is fixed between the thin plate support 41 and the pressing member 42 with bolts 43. A plurality of bolts 43 are used, and the thin plate 31a is fixed at a plurality of locations.

  In this way, since the thin plate 31a itself is used as a member for discharging coal, that is, no carbide tip is used, the thin plate 31a itself can be reliably fixed and will not fall off.

  As described above, because the cemented carbide chip is not used, the ceramic piece 50 is attached to the thin plate 31a and the ceramic portion 51 is formed at the tip (lower end) of the thin plate 31a. Wear was prevented. As shown in FIGS. 9A and 9B, a plurality of ceramic pieces 50 are fixed to the thin plate 31a by fixing means such as bolts 52 or the like. The size of the ceramic piece 50 is such a size that it is easy to mount without breaking, and a hole is formed in the ceramic piece 50 in advance, and a hole is also formed in the thin plate 31a. And the hole of the thin plate 31a are combined, and the ceramic piece 50 is fixed to the thin plate 31a with a bolt 52.

  The ceramic piece 50 may be arranged upward with the tip side of the thin plate 31a as a reference position, and considering the contact with coal, the height of the ceramic piece 50, that is, the height of the ceramic portion 51 is set. H is determined. Of course, the ceramic piece 51 may be formed by attaching the ceramic piece 50 to the entire surface of the thin plate 31a, but it is only necessary to attach the ceramic piece 50 only to a portion in contact with coal (that is, The ceramic part 51 may be formed).

  In this way, since the ceramic piece 50 is mounted on the thin plate 31a, not only can the wear of the thin plate 31a be prevented, but the ceramic piece 50 is easily available and can be easily repaired.

It is the figure which looked at an example of the coal dispensing device by this Embodiment of this invention from upper direction. It is the figure which looked at an example of the coal dispensing apparatus by this Embodiment of this invention from the side. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2 (a cross-sectional view of the scraper device). FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is CC sectional view taken on the line of FIG. FIG. 2 is a view of a scraper device used in the coal dispensing device shown in FIG. It is the figure which looked at the scraper apparatus from the side, with a part broken away. It is DD sectional drawing of FIG. It is a figure which shows a part of paying-out body of a scraper apparatus in detail, (a) is the figure seen from the front, (b) is the figure seen from the side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Conveyor (call bunker conveyor) apparatus 12 Scraper apparatus 13 Conveyor 14 Hopper 15 Conveyor belt 16 Carry roller 17 Electric motor 18 Roller chain 19 Sprocket 30 Apparatus housing 31 Dispensing body 37 Power cylinder apparatus 50 Ceramic piece

Claims (5)

In the granular object dispensing device that dispenses the granular object from the conveyor to a storage unit disposed below the conveyor,
A plurality of scraper devices disposed above the conveyor;
The each of the plurality of scrapers device, a plate-shaped dispensing member extending toward the conveyor side, liner wherein provided on the housing of the scraper device which extends from the upper side to the lower side of the conveyor provided on both sides of the conveyor And having a body,
A ceramic portion is mounted on at least the tip side of the payout body,
A granular object dispensing apparatus, wherein the dispensing object is driven in a direction crossing a conveying direction of the conveyor to discharge a granular object on the conveyor to the storage unit.   2. The granular object dispensing apparatus according to claim 1, wherein the dispensing body is sandwiched between a casing and a pressing member of the scraper device and fixed by a bolt.   3. The granular object dispensing apparatus according to claim 1, wherein a plurality of ceramic pieces are mounted on the dispensing body, and the ceramic portion is formed by the ceramic pieces. A plurality of holes are formed in the payout body,
A hole is formed in the ceramic piece in advance,
The bolt is inserted into the hole in a state where the hole of the discharger and the hole of the ceramic piece are aligned, and the ceramic piece is attached to the discharger with the bolt. Granular object dispensing device. The granular object dispensing apparatus according to any one of claims 1 to 4, wherein the granular object is coal.

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