JP4839412B2 - Belt conveyor cleaner - Google Patents

Description

  The present invention relates to a cleaner device for removing deposits on the surface of a conveyor belt.

In a thermal power plant, a steel mill, a chemical plant, a sewage treatment plant, a garbage disposal plant, and the like, a belt conveyor that conveys various raw materials, fuels, treated materials, wastes, and the like is used. As shown in FIG. 8, the belt conveyor 1 has a rubber belt B wound around a predetermined width between a driving pulley 2 and a driven pulley (not shown), and the driving pulley 2 is rotated to rotate the belt B. It makes the circuit move between both pulleys.
Of the belt B that circulates, the conveyed product is placed on one end of the upper surface of the belt B of the carrier portion (outward path side) 6 located on the upper side, and the conveyed product is conveyed from one end of the conveyor 1 to the other end as the belt B moves. The In the reversing portion 7 at the other end, the belt B is reversed to a return portion (return path side) 8 positioned on the lower side as indicated by an arrow a in FIG. Thus, it is dropped from the belt surface and removed (see Patent Document 1 FIG. 1).

In the conveyor 1 using this type of rubber belt B, the transported material tends to adhere to the surface of the belt B, particularly when a wet transported product is placed thereon. If this amount of deposits increases, the belt B is meandering with the center of gravity deviating, and the end of the belt B may be damaged by touching the frame. In addition, if the deposit falls on the floor or the like in the middle, not only will the transport efficiency deteriorate, but it is also dangerous if the transported material is a flammable material. .
For this reason, the cleaners 10 and 9 are attached in the vicinity of the reversing part 7 or in a predetermined place of the return part 8, and the scraper 5 of the cleaners 10 and 9 is pressed against the surface of the belt B to scrape off and remove the deposits. ing. In the figure, 3 is an intermediate pulley.

Among these cleaner devices 9 and 10, the cleaner device 9 provided in the return portion 8 is configured such that when the tip of the scraper 5 or the belt B wears, the scraper 5 is positioned up and down with respect to the belt B by the adjusting bolt 9a. Adjustment is made so that the tip of the scraper 5 is always pressed against the surface of the belt B, and adhering matter can be removed as long as the wear of the tip does not exceed a predetermined limit (Patent Document 1, paragraph 0021). reference).
Further, the cleaner device 10 provided in the reversing unit 7 urges the scraper 5 on the surface of the belt B by urging the scraper 5 around the axis of the holding shaft that holds the scraper 5 via urging means such as the spring 4. It can be pressed in contact.

  A tip 5a made of a hard material such as cemented carbide or ceramic is attached to the tip of the scraper 5 in order to avoid frequent scraper replacement due to rapid wear. Generally, the tip 5a is worn. The wear amount of the scraper 5 (chip 5a) in a range that does not disappear due to this, or the wear amount of the belt B reaching the minimum thickness at which the belt B can maintain a predetermined strength is often set as the wear limit.

JP 2005-225587 A

  By the way, in general, the conveyor belt B is supported by a guide pulley (not shown) so that the central portion in the width direction is curved downward and convexly by a guide pulley (not shown) in order to stably load and convey a conveyed object during traveling. Yes. For this reason, a large amount of the conveyed product is loaded on the center portion in the width direction of the belt B, and from a rule of thumb, the belt thickness decreases greatly from the both ends in the belt width direction toward the center portion. Wear is fast (see space s in FIG. 10B). For example, as shown in FIG. 9, the degree of wear at the center portion was almost linear in the measurement for about two and a half years from June 29, 2006 to December 8, 2008.

On the other hand, in the reversing unit 7, the belt B moves along the curved surface of the pulley 2 with no irregularities, and the scraper 5 (chip 5a) is pressed against the pulley 2 with the belt B interposed therebetween. The thickness reduction amount directly affects the degree of pressure contact between the tip 5a and the belt B.
That is, as shown in FIG. 10 (a), when there is no difference in the thickness of the belt B over the entire length in the width direction, the tip 5a and the belt B are in pressure contact with each other over the entire length in the width direction, Done. However, as shown in FIG. 5B, when the belt B has a difference in thickness, a large gap s is gradually formed from both ends in the width direction toward the center, and smooth stripping cannot be performed.

  An object of the present invention is to prevent the stripping effect from deteriorating even if the thickness of the belt B in the cleaner device 10 of the reversing unit 7 changes.

In order to achieve the above object, as one means of the present invention, the scraper can be displaced in the press-contact direction over the entire length in the belt width direction, and the bending rigidity of the scraper holder in the press-contact direction is set to the width of the belt B. It gradually increased from both ends in the direction toward the center.
When the scraper is pressed against the belt via the holding body due to the urging force around the axis of the holding shaft, the amount of bending differs depending on the degree of bending rigidity (if the bending rigidity is low). Therefore, the pressure contact position can change depending on the degree of bending rigidity of the holding body. That is, when this scraper is pressed against a belt having a reduced thickness at the center, the amount of bending of the holder changes from the center to both ends due to the difference in bending rigidity of the holder, and the scraper is pressed against the belt over its entire length. Then, the scraper is pressed against the central portion in the width direction where the thickness is reduced to perform a smooth peeling action (see FIG. 4B).

  As a configuration of the present invention, a scraper in a belt width direction of a belt conveyor, a holding shaft having the belt width direction as an axial direction, and a flexible holding body that is provided on the holding shaft and holds the scraper. The scraper can be displaced in the press-contact direction over the entire length in the width direction in a belt conveyor cleaner device in which the scraper is press-contacted with a pulley via a belt by an urging force around the axis of the holding shaft. In addition, it is possible to adopt a configuration in which the bending rigidity of the holding body in the press-contact direction is gradually increased from both ends of the belt in the width direction toward the center.

  As a means for gradually increasing the bending rigidity of the holding body from both ends in the width direction of the belt toward the center, the scraper is supported on the holding shaft by three or more legs forming the holding body arranged in the width direction, and each leg. The mounting plate is provided on the holding shaft over the entire length in the axial direction, and each leg is formed of a material having the same mechanical strength and the same thickness (cross-sectional shape). The length can be gradually shortened from both ends of the belt toward the center. The reason why the number of legs is three or more is that if the number of legs is two or less, the legs are only at both ends in the belt width direction, and the rigidity of the holding body cannot be gradually increased from both ends of the belt toward the center. . The number of legs is preferably as large as possible from the aspect of smoothing the degree of gradually increasing the bending rigidity of the holding body from both ends in the width direction of the belt toward the center, but is appropriately determined in consideration of manufacturability and the like. .

As another means of the present invention for achieving the above object, the scraper can be displaced in the press-contact direction over the entire length in the belt width direction, and the elasticity of the elastic body interposed between the scraper and the holding shaft can be obtained. The rate was gradually increased from both ends of the belt in the width direction toward the center.
When the scraper is pressed against the belt via the elastic body by the urging force around the axis of the holding shaft, it becomes difficult to bend if the elastic modulus is high, and the elastic modulus gradually increases from both ends of the belt in the width direction toward the center. Therefore, the scraper gradually decreases in the amount of bending from both ends of the belt in the width direction toward the center, and is pressed against the entire length of the belt according to the amount of bending. The scraper is pressed against the surface to provide a smooth peeling action.

  The invention comprises a scraper that is long in the belt width direction of the belt conveyor, a holding shaft having the belt width direction as an axial direction, and a holding body that is provided on the holding shaft via an elastic body and holds the scraper. The scraper can be displaced in the pressure-contact direction over the entire length in the width direction in a belt conveyor cleaner device in which the scraper is pressure-contacted with a pulley via a belt by an urging force around the axis of the holding shaft. A configuration in which the elastic modulus of the elastic body is gradually increased from both ends of the belt in the width direction toward the center can be adopted.

  The “center” of the “center from both ends in the width direction of the belt” is not only the center of the position of the same length from both ends, but may be slightly shifted to the end side depending on the loading position of the conveyed product to the belt. However, even if the charging position is shifted to the end side, it may be the center of the position having the same length. The difference in the wear thickness of the belt becomes a problem because the thickness difference in the vicinity of the central portion of the belt is not so different in the stripping action.

  The scraper can be integrated over the entire length in the width direction or divided into the required number in the width direction. At this time, in order to make the scraper displaceable in the press-contact direction over the entire length in the belt width direction, in the case of the former, the scraper itself needs to be flexible. The individual divided scraper may be flexible, but may be a non-flexible material such as a cemented carbide chip. In this case, the holding member for holding the scraper is a flexible member. The scraper can be displaced in the press-contact direction by bending the holding body, or the holding body is provided on the holding shaft via an elastic body so that the scraper can be displaced in the press-contact direction by bending the elastic body. Even the former integrated body can employ a flexible leg.

  As described above, according to the present invention, the scraper can be displaced in the press-contact direction over the entire length in the belt width direction, and the bending rigidity in the press-contact direction of the holder of the scraper is increased from both ends in the width direction of the belt B toward the center. Since the elastic modulus of the elastic body that supports the scraper is gradually increased from the both ends in the width direction of the belt toward the center, even if the thickness of the central portion of the belt decreases due to use, The scraper is securely pressed against each other for smooth stripping. For this reason, the adhesion residue on the belt is smoothly removed over a long period of time.

1 shows an embodiment of the present invention, (a) is a front view, (b) is a right side view. The principal part perspective view from the back of the embodiment Schematic action diagram of the embodiment It is the same action diagram, (a) is the initial use, (b) is after long-term use The other embodiment is shown, (a) is a central part omitted perspective view, (b) is a main part perspective view from the back. (A)-(b) is the schematic of each other embodiment. Another embodiment is shown, (a) is a front view, (b) is a right side view. Partial schematic diagram of belt conveyor cleaner Figure of change with time of thickness of belt conveyor center in width direction It is an operational diagram of a conventional cleaner device, (a) is the initial use, (b) is after long-term use

This embodiment is a cleaner device 10 attached to the pulley 2 in the belt conveyor 1 shown in FIG. As shown in FIG. 1 and FIG. 2, the cleaner device 10 includes a holding shaft 11 in which the width direction of the belt B is an axial direction, a mounting plate 12 welded over the length direction of the holding shaft 11, A support piece 14 bolted to the mounting plate 12 with a rubber support 13 interposed therebetween, a galvanized steel support leg 15 extending upward from the support piece 14, and a scraper S supported by the support leg 15. It consists of.
The scraper S is divided in the belt width direction, and each of the divided scrapers 16 includes a chip 16a made of cemented carbide or ceramic, and a plate piece 16b for supporting the chip 16a. The number of divisions of the scraper S is appropriately set so that smooth stripping can be performed in consideration of the width of the belt B and the thickness reduction degree in the belt width direction.

  The upper edge of the mounting plate 12 has an upward arc shape (see FIG. 2), and the support legs 15 are welded to the upper edge at equal intervals in the length direction. Each support leg 15 has the same thickness (cross-sectional shape) and the same mechanical strength, and two support legs 15 support the split scraper 16, and the pair of support legs 15, 15 have the same length. Has been. Further, the scraper S composed of the divided scrapers 16 has the same tip edge (the tip edge of each divided scraper 15). Therefore, the pair of support legs 15 gradually move from the belt width direction end toward the center. The bending rigidity is increased.

Because the lengths of the support legs 15 are different, for example, as shown in FIG. 3, ten support legs 15 are provided at equal intervals on the holding shaft 11 via a mounting plate 12 or the like, and the lengths thereof are illustrated. In this case, if the same bending amount is to be obtained for each support leg 15, the illustrated force is required. For this reason, when the divided scrapers 16 are pressed against the belt B by the rotational force of the holding shaft 11 (pressing force to the belt B), the support legs 15 at the ends are greatly bent as compared with the support legs 15 at the center. This displacement of the deflection amount indicates the degree of following the unevenness on the surface of the belt B.
Therefore, when the pressing force of the holding shaft 11 is set so that the split scraper 16 is pressed against the central portion of the belt B whose thickness is reduced, the end-side support leg 15 is bent more greatly than the center support leg 15 and the belt surface. Thus, the scraper S comes into contact with the belt surface over its entire length (see FIG. 4B).

The holding shaft 11 is rotatably supported by the apparatus frame F with a bearing 17, and lateral working pieces 19 are provided at both ends thereof via fixed rings 18. The operating piece 19 is fixed to the holding shaft 11 with a bolt 19a, and the operating piece 19 is fixed to an arbitrary position in the circumferential direction of the holding shaft 11 by tightening or loosening the bolt 19a.
A vertical adjustment bolt 20 is screwed into the apparatus frame F, and the tip thereof is in contact with the operating piece 19. By adjusting the screwing amount of the adjusting bolt 20, the position of the scraper 16 with respect to the belt B is adjusted via the operating piece 19. For this reason, the urging force around the axis of the holding shaft 11 is adjusted by the position of the operating piece 19 with respect to the holding shaft 11 and the screwing amount of the adjusting bolt 20, and the pressure contact force (pressing force) of the scraper 16 with respect to the belt B is optimized. And This adjustment is performed not only in the initial setting but also in response to a change in the thickness of the belt B.

In the cleaner device 10, since the belt B does not change in thickness in the width direction at the time of initial setting (because of the same thickness), as shown in FIG. 4A, the scraper S (divided scraper 16) Removes the adhering residue by pressing almost linearly against the belt surface.
As shown in FIG. 5B, when the thickness of the belt B gradually decreases from the both ends in the width direction toward the center as it is used, each of the divided scrapers 16 responds to the thickness change due to the difference in bending rigidity of the support legs 15. As a result, the amount of deflection changes, and each chip 16a is reliably pressed (along) along the entire length in the width direction of the belt B to smoothly remove the adhered residue. At this time, the pressing force is adjusted so that each chip 16a is securely pressed over the entire length in the belt B width direction.

  FIG. 5 shows another embodiment. In this embodiment, the scraper S is formed of a hard urethane resin, and the scraper S is attached to the holding shaft 11 by a resin support leg 15. The scraper S is integrated with each support leg 15 at the time of molding. Each of the support legs 15 is set to have a gradually higher bending stiffness from both ends in the belt width direction toward the center. The bending rigidity is adjusted by changing the cross-sectional shape (shape, size, etc. of the hole 15a) of the resin material, adjusting the thickness / thickness of the ribs of the support legs 15, and adjusting the number / position of the ribs.

In this embodiment, the scraper S ensures flexibility in the belt width direction by its own flexibility. For this reason, as in the above embodiment, when the thickness of the belt B gradually decreases from the both ends in the width direction toward the central portion as it is used, the scraper S responds to the thickness change due to the bending rigidity difference of each support leg 15. As the amount of deflection changes, the scraper S is surely pressed (along) along the entire length in the width direction of the belt B to smoothly remove the adhered residue.
In this embodiment, the scraper S can be divided in the belt width direction as in the above embodiment. In this case, of course, each of the divided scrapers is supported by the support legs 15.

  In each of the above-described embodiments, the division width of the scraper S is not limited to the “equal width” as described above, and the center portion and the end portion can be made different as shown in FIGS. 6 (a) and 6 (b). . This width can be changed as appropriate. Further, as shown in FIG. 4B, the number of support legs 15 of the one-part scraper 16 is not limited to one (not limited to FIG. 3A), and may be arbitrary, such as two, three, etc. In the case of two or more The split scraper 16 is preferably flexible.

In each of the above embodiments, by gradually increasing the bending rigidity of the holding body of the scraper S from the both ends in the width direction of the belt B toward the center, the scraper can be reliably secured in correspondence with the reduction in the thickness of the central portion of the belt B. However, the elastic modulus of the elastic body 13 that supports the scraper S can be gradually increased from both ends in the width direction of the belt B toward the center to ensure the operation.
For example, as shown in FIG. 7, in the embodiment of FIG. 1, the mounting position of the mounting piece 14 to the mounting plate 12 is set to the same level (the position where the support leg 15 has the same length and is separated from the holding shaft 11 by the same distance). If the elastic modulus of the rubber support 13 that supports each mounting piece 14 is gradually increased from both ends in the width direction of the belt B toward the center, the biasing force around the axis of the holding shaft 11 When the scraper S is pressed against the belt B via the elastic body 13, the support body 13 is difficult to bend when the elastic modulus is high, and the elastic modulus gradually increases from both ends in the width direction of the belt B toward the center. Therefore, the scraper S gradually decreases in the amount of bending from both ends in the width direction of the belt B toward the center, and is pressed in accordance with the amount of bending over the entire length of the belt B. Also a scraper Pressure to perform a smooth stripping action. At this time, the support legs 15 can have the same thickness and the same mechanical strength. That is, the mechanical strengths of the support bodies such as the support legs 15 after the elastic body (support body 13) of each scraper S can be made the same. This aspect in which the elastic modulus of the elastic body is changed is effective when it is difficult to obtain a change in rigidity of the support leg 15 due to a change in its length or the like.
The rubber support 13 may be any elastic body such as a spring, and the elastic modulus change of the elastic body can be used in combination with the bending rigidity change of the holding body. In this case, it is effective when only one of the belts cannot obtain a satisfactory change in pressure contact force from the central portion of the belt toward both ends.

  In each of the above embodiments, the rubber support 13 or the scraper S itself is elastically pressed against the belt B of the scraper S. This pressure buffering is provided with a spring 4 on the adjusting bolt shown in FIG. Can also be done. Thus, since various aspects can be considered for the embodiment of the present invention, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Belt conveyor 2 Pulley 6 Belt forward path 7 Belt inversion part 8 Belt return path 9 Return path side cleaner apparatus 10 Reverse part (return part) side cleaner apparatus 11 Holding shaft 12 Mounting plate 13 Rubber support body 14 Installation piece 15 Support leg 16 Split scraper 16a Scraper chip 16b Chip support piece 20 Adjustment bolt B Belt S Scraper

Claims (4)

Long scraper belt (B) the width direction of the belt conveyor (1) (S), said device frame belt width direction and the axial direction (F) to be rotatably supported with a bearing (17) the holding shaft ( 11) and a flexible holding body that is provided on the holding shaft (11) and holds the scraper (S), and the scraper ( S) is a belt conveyor cleaner device (10) that is pressed against the pulley (2) via the belt (B).
Said scraper (S) is divided over the width direction entire length, by the leg (15) forming the holding member arranged their division scraper (16) to each of the width direction supported by the holding shaft (11), the the flexural rigidity of the upper Symbol pressure direction of the leg (15) of each divided scraper (16) is increased gradually toward the center from both ends in the width direction of the belt (B), over the scraper (S) in its entire length A cleaner device for a belt conveyor, wherein the belt device is in contact with the belt surface . Long scraper belt (B) the width direction of the belt conveyor (1) (S), said device frame belt width direction and the axial direction (F) to be rotatably supported with a bearing (17) the holding shaft ( 11) and a flexible holding body that is provided on the holding shaft (11) and holds the scraper (S), and the scraper ( S) is a belt conveyor cleaner device (10) that is pressed against the pulley (2) via the belt (B).
The scraper (S) is integrally formed to be flexible over the entire length in the width direction, and the scraper (S) is held by the three or more legs (15) forming the holding body arranged in the width direction. and supported by a shaft (11), the press contact direction bending rigidity from both ends in the width direction of the upper Symbol belt (B) is increased gradually toward the center, its length and the scraper (S) of the leg (15) A belt conveyor cleaner device, wherein the belt surface is in contact with the belt surface . The holding shaft (11) is provided with a mounting plate (12) extending over the entire length in the axial direction, the legs (15) are formed of the same mechanical strength and the same thickness material, and the length of the legs (15) is increased. The length of the belt (B) is gradually shortened from both ends in the width direction toward the center, and the bending stiffness in the pressure-contact direction of each leg (15) is increased from both ends in the width direction of the belt (B) toward the center. The belt conveyor cleaner according to claim 1, wherein the belt conveyor cleaner is gradually increased. Long scraper belt (B) the width direction of the belt conveyor (1) (S), said device frame belt width direction and the axial direction (F) to be rotatably supported with a bearing (17) the holding shaft ( 11) and a holding body that is provided on the holding shaft (11) via an elastic body (13) and holds the scraper (S), and by an urging force around the axis of the holding shaft (11), In the cleaner device (10) for the belt conveyor, the scraper (S) is pressed against the pulley (2) with the belt (B) interposed therebetween.
The scraper (S) is divided over the entire length in the width direction, and the divided scraper (16) is individually supported by the legs (15) forming the holding bodies arranged in the width direction, and each of the divided scrapers ( The leg (15) of 16) has the same mechanical strength, the same thickness and the same length, and can be individually bent on the holding shaft (11) so as to be foldable in the press-contact direction via the elastic body (13). In addition, the elastic modulus of each elastic body (13) is gradually increased from both ends in the width direction of the belt (B) toward the center, and the scraper (S) is applied to the belt surface over its entire length. A cleaner device for a belt conveyor, which is in contact with each other .

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