JP2017019658A - Scraper and belt cleaner device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce wear of a belt and maintain scraping effect when deposits on the belt are removed by using a scraper.SOLUTION: A scraper removes deposits of a belt and includes: a chip having a contact surface which contacts with the belt; and a support medium which is formed by a material having hardness lower than that of the chip, has a facing surface facing the belt, and sandwiches the chip which is embedded in a belt width direction groove provided on the facing surface with the contact surface exposed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a scraper that removes deposits on a belt, and a belt cleaner device including the scraper.

  A belt conveyor is generally used to convey raw materials such as ore, lime, and coke. The belt conveyor conveys the raw material on the belt conveyance surface, and pays out the raw material at the end of the belt conveyor. However, there is a problem in that the raw material remains as an adhering matter on the conveying surface of the belt, and the adhering matter damages a pulley or the like for driving the belt of the belt conveyor.

  Therefore, for example, as described in Patent Document 1 and Patent Document 2 below, a support metal such as stainless steel is embedded in the end of an elastic body such as rubber, and a cemented carbide chip is bonded to the tip of the support metal. A scraper and a belt cleaner equipped with the scraper have been developed.

JP-A-3-162309 JP-A-2-28411

  Here, the example of the conventional scraper as described in patent document 1 is shown in FIG. A conventional scraper 90 shown in FIG. 5 includes a chip 91 made of cemented carbide, a support metal 92 made of stainless steel, and an elastic body 93. The chip 91 is bonded to the support metal 92, and the support metal 92 is embedded in the elastic body 93. In the scraper 90, when the chip 91 comes into contact with the belt 2, the deposits on the surface of the belt 2 can be scraped off.

  FIG. 5A shows a state in which the belt 2 is stationary after the scraper 90 is installed. In this state, the tip 91 is in contact with the belt 2 perpendicularly. In terms of design, it is intended that the chip 91 is maintained in a vertical state in this way even after the operation is started and the belt 2 is driven. However, when the belt 2 is driven in the transport direction, the elastic body 93 is deformed as shown in FIG. 5B due to the shearing force in the transport direction that the chip 91 receives from the belt 2, and the support hardware 92 is transported. It will tilt in the direction. As a result, only the edge of the tip 91 comes into contact with the conveying surface of the belt 2, and the pressing force to the belt 2 is concentrated on the edge of the tip 91, whereby the wear of the belt 2 is promoted.

  Further, when the state where only the edge of the tip 91 is in contact with the conveying surface of the belt 2 continues as described above, the edge of the tip 91 is worn and the tip 91 is inclined as shown in FIG. A new contact surface that contacts the belt 2 is generated. Then, the state in which the chip 91 is inclined with respect to the conveyance surface of the belt 2 is fixed, and the deposit ST is likely to stay between the chip 91 and the conveyance surface of the belt 2.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to reduce belt wear and remove deposits when removing scraps on the belt using a scraper. It is an object of the present invention to provide a new and improved scraper and belt cleaner device capable of maintaining the scraping effect of the above.

  In order to solve the above problems, according to an aspect of the present invention, in a scraper that removes deposits on a belt, the scraper is formed of a chip having a contact surface that contacts the belt, and a material having a lower hardness than the chip. A scraper having a facing surface facing the belt and sandwiching the chip embedded with the contact surface exposed in a groove in the belt width direction provided on the facing surface. Is provided.

  The support may be formed of a resin, or may be formed of a material having a type A durometer hardness of 80 or more as defined in JIS K6253-3.

  The groove may be provided at least a thickness of the chip away from the end of the facing surface in the belt conveyance direction.

  Moreover, in order to solve the said subject, according to another viewpoint of this invention, a belt cleaner apparatus provided with the above scrapers may be provided.

  According to the above configuration, since it is possible to maintain the scraper tip in a state of being substantially perpendicularly contacted with the belt, it is possible to reduce the wear of the belt and to scrape off the adhered matter. The effect can be maintained.

  As described above, according to the present invention, it is possible to reduce the wear of the belt and maintain the scraping effect of the deposit when removing the deposit on the belt using the scraper.

It is a figure which shows the structure of the belt cleaner apparatus which concerns on one Embodiment of this invention. It is a figure which shows the whole structure of the scraper which concerns on one Embodiment of this invention. It is a figure which expands and shows the front-end | tip part of the scraper shown in FIG. It is a figure for demonstrating the state after the belt drive start of the scraper which concerns on one Embodiment of this invention. It is a figure which shows the example of the conventional scraper.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram showing a configuration of a belt cleaner apparatus 1 according to an embodiment of the present invention. Referring to FIG. 1, the belt cleaner device 1 includes a scraper 10, a fastening member 13, a scraper support member 14, a tubular shaft 30, tubular shaft support members 31 a and 31 b, an adjustment bolt 32, and a fixing member 33.

  The scraper 10 includes a chip 11 and a support 12 and is connected to a scraper support member 14 by a fastening member 13. The support 12 supports the chip 11 by embedding the chip 11 in a groove to be described later. The chip 11 has an abutting surface 11s that abuts on the conveying surface 2s of the belt 2, and the support 12 has an opposing surface 12s that opposes the conveying surface 2s. The scraper 10 is disposed at a position where the contact surface 11s of the chip 11 can contact substantially perpendicularly to the transport surface 2s. The chip 11 in contact with the transport surface 2s scrapes off and removes the adhering matter adhering to the transport surface 2s.

  FIG. 2 is a diagram showing an overall configuration of the scraper 10 according to the embodiment of the present invention. 2A is a plan view of the scraper 10, FIG. 2B is a front view of the scraper 10, and FIG. 2C is a side view of the scraper 10. FIG. Referring to FIGS. 2A to 2C, the scraper 10 includes a chip 11 and a support 12 as described above. In the illustrated example, a fastening member 13 for fixing the scraper 10 to the scraper support member 14 is provided below the support 12.

  The chip 11 is formed of, for example, a cemented carbide such as tungsten carbide. As for the hardness of the chip 11, for example, the Rockwell A hardness HRA defined in JIS Z2245 is about 90. Alternatively, the chip 11 may be formed of a hard material such as ceramics or cermet, or a material obtained by adding particles or powder such as diamond to the above material.

  The support 12 is made of a material having a lower hardness than the chip 11. For example, the support 12 is made of a material having a type A durometer hardness of 80 or more as defined in JIS K6253-3. More specifically, the support 12 may be formed of a resin such as urethane or plastic. Alternatively, the support 12 may be formed of a composite material such as metal or fiber reinforced plastic.

  In the conventional scraper, as described above with reference to FIG. 5, the elastic body 93 is deformed by the shearing force acting on the chip 91 from the belt 2. As a result, the chip 91 is inclined and only the edge portion is the conveying surface. There was a problem of contact with 2s. However, in the scraper 10 according to this embodiment, since the support body 12 formed of a low-elasticity material supports the chip 11 even though the hardness is lower than that of the chip 11 as described above, even if the shear force from the belt 2 is received, the chip 11 hardly tilts in the transport direction. Therefore, even when the belt 2 starts to be driven, it is possible to maintain the state in which the chip 11 is in contact with the transport surface 2s substantially perpendicularly.

  FIG. 3 is an enlarged view of the tip of the scraper 10 shown in FIG. As shown in FIG. 3, in the scraper 10, a groove 12g is formed on the opposing surface 12s of the support 12, and the chip 11 is embedded in the groove 12g with the contact surface 11s exposed. The contact surface 11s of the chip 11 embedded in the groove 12g contacts substantially perpendicular to the transport surface 2s. The chip 11 is firmly held by the support 12 from both sides by being embedded in the groove 12g. Therefore, in this embodiment, even if a shearing force is applied after the driving of the belt 2 is started, the tip 11 does not tilt and can stably contact substantially perpendicularly to the transport surface 2s.

Note that, in the z-axis direction shown in FIG. In this case, the contact surface 11s and the facing surface 12s form substantially the same plane. Alternatively, the depth of the groove 12g may be shorter than the length of the chip 11. In this case, the contact surface 11s protrudes more than the facing surface 12s. The length of the chip 11 in the present embodiment is not particularly limited, for example, when the thickness d _a of the chip 11 is 2mm may the length as about 10 mm.

Still referring to FIG. 3, a groove 12g provided in the support 12, it is provided away from the edge of the facing surface 12s by a distance d _b. In the example shown in FIG. 3, the conveying direction of the belt 2, the thickness of the chip 11 (corresponding to the width of the groove 12 g) in case of a d _a, such that d _a ≦ d _b, the thickness of the support 12 The position of the groove 12g is determined. Thereby, for example, when a shearing force is applied from the belt 2 to the chip 11, it is possible to prevent the support 12 from being broken due to a high load applied to the portion of the support 12 that holds the chip 11. More specifically, when d _a = 2 mm, d _b ≧ 2 mm is preferable, but d _b = 2.5 mm is more preferable. Although in the example shown are equivalent on both sides of the distance d _b of the groove 12g, these distances may be unequal. For example, as the distance d _b is greater than the upstream side in the transport direction of the belt 2 on the downstream side, the position of the thickness and the groove 12g of the support 12 may be set.

  In the scraper 10, a core material may be embedded in the lower portion of the chip 11 inside the support 12. The core material is formed of a material such as stainless steel, for example, and has a rod shape or a plate shape. By embedding the core material in the support body 12, the rigidity of the support body 12 can be increased. With this configuration, the support 12 is less likely to be deformed, so that the contact direction of the scraper 10 with respect to the transport surface 2s can be more reliably maintained.

  With reference to FIG. 1 again, the configuration of the belt cleaner apparatus 1 other than the scraper 10 will be described. In the belt cleaner apparatus 1, the scraper support member 14 that supports the scraper 10 is fixed to the support column 4 via an attachment portion including a tubular shaft 30, tubular shaft support members 31 a and 31 b, an adjustment bolt 32, and a fixing member 33. ing. More specifically, the scraper support member 14 is fixed to the tubular shaft 30. The tubular shaft 30 is supported by a pair of tubular shaft support members 31a and 31b. By rotating the adjustment bolt 32 penetrating the fixing member 33, the tubular shaft support member 31 a can be moved in the vertical direction along the column 4. At this time, the scraper 10 also moves in the vertical direction together with the tubular shaft support member 31a, that is, in a direction perpendicular to the conveying surface 2s of the belt 2. In this embodiment, in this way, the position of the scraper 10 can be adjusted so that the chip 11 contacts the belt 2 with an appropriate pressing force. In addition, the structure of the attachment part of the above belt cleaner apparatuses 1 is only an example, and embodiment of this invention is not limited to the example demonstrated above.

  Next, with reference to FIG. 4, the state after the belt drive start of the scraper 10 which concerns on embodiment of this invention is demonstrated. FIG. 4A is a diagram illustrating a state where the belt 2 is stationary. FIG. 4B is a diagram illustrating a state where the belt 2 is driven. FIG. 4C is a diagram illustrating a state after a lapse of time from the start of driving of the belt 2.

  In the state shown in FIG. 4A, the driving of the belt 2 has not yet started. In this state, the tip 11 is in contact with the conveyance surface 2s at the contact surface 11s substantially perpendicularly. As described above, the adjustment force 32 is used to adjust the pressing force of the tip 11 against the belt 2 on the contact surface 11s. For example, when the pressing force to the belt 2 is increased, the adjustment by the adjustment bolt 32 is performed so that the scraper 10 moves in the positive direction of the z axis shown in FIG.

  Next, in the state shown in FIG. 4B, driving of the belt 2 in the conveyance direction is started. Even in this state, the support 12 is not inclined in the transport direction. This is because the support 12 has low elasticity as described above, and is not easily deformed even if it receives a shearing force from the belt 2. Therefore, the chip 11 can maintain a state in which the chip 11 is in contact with the transport surface 2s substantially perpendicularly. Since the chip 11 contacts the belt 2 over the entire conveyance surface 2s, for example, excessive wear of the belt 2 that occurs when only the edge contacts the conveyance surface 2s can be avoided. Moreover, the stay of the deposit | attachment as shown in FIG.5 (C) is also prevented, and it becomes possible to maintain the scraping effect of the deposit | attachment by the chip | tip 11. FIG.

  Next, in the state shown in FIG. 4C, time has elapsed since the driving of the belt 2 in the conveyance direction was started. For example, when the opposing surface 12 s of the support 12 forms substantially the same plane as the contact surface 11 s of the chip 11 and comes into contact with the transport surface 2 s, the support 12 has a lower hardness than the chip 11, so that the drive As time elapses after the start, a phenomenon in which the support 12 forming the facing surface 12s wears ahead may occur. As a result, as shown in FIG. 4C, the contact surface 11s can protrude from the facing surface 12s. However, even if the facing surface 12s does not come into contact with the transport surface 2s, the structure in which the chip 11 is held by being embedded in the groove 12g of the support 12 is not affected. Therefore, even when the facing surface 12s is worn, the contact direction of the chip 11 with respect to the transport surface 2s is maintained in a substantially vertical direction.

  In summary, the scraper 10 according to the present embodiment has a configuration in which the groove 12g is provided in the facing surface 12s facing the belt 2 of the support 12 and the chip 11 is embedded in the groove 12g. With this configuration, even when the scraper 10 receives a shearing force from the belt 2, the scraper 10 can maintain a state in which the tip 11 is in contact with the belt 2 substantially perpendicularly on the contact surface 11 s. Thereby, it is possible to prevent the wear of the belt 2 from being promoted by the edge of the chip 11 coming into contact with the transport surface 2s, and it is possible to maintain the scraping effect of the deposits on the chip 11. . In addition, this configuration makes it difficult for deposits to stay on the chip 11. Furthermore, since the support 12 is made of a material having a hardness lower than that of the chip 11, the opposing surface 12s of the support 12 can be worn when the support 12 comes into contact with the transport surface 2s. However, such wear does not affect the structure in which the support 12 clamps the chip 11, so that the chip 11 can be kept in contact with the transport surface 2 s substantially perpendicularly.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the above embodiment, as shown in FIG. 2A, the scraper is integrally formed in the belt width direction, but the present invention is not limited to such an example. For example, the scraper may be divided in the belt width direction, and a plurality of short scrapers may be provided continuously in the belt width direction.

DESCRIPTION OF SYMBOLS 1 Belt cleaner apparatus 10 Scraper 11 Tip 12 Support body 13 Fastening member 14 Scraper support member 2 Belt 30 Tubular shaft 31a, 31b Tubular shaft support member 32 Adjustment bolt 33 Fixing member 4 Strut

Claims (5)

In a scraper that removes belt deposits,
A chip having a contact surface that contacts the belt;
The chip, which is formed of a material having a lower hardness than the chip, has a facing surface facing the belt, and is embedded with the contact surface exposed in a groove in the belt width direction provided on the facing surface. A support for sandwiching
A scraper.   The scraper according to claim 1, wherein the support is formed of a resin.   The scraper according to claim 1 or 2, wherein the support is formed of a material having a type A durometer hardness of 80 or more as defined in JIS K6253-3.   The scraper according to any one of claims 1 to 3, wherein the groove is provided away from an end of the facing surface by a thickness of the chip or more in the conveyance direction of the belt. A belt cleaner apparatus provided with the scraper of any one of Claims 1-4.

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