JP7355999B2 - Belt cleaner and conveyance equipment - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to belt cleaners, and more particularly to belt cleaners for removing deposits from the conveying surface of a conveyor belt. Further, the present disclosure relates to a conveyance facility including the belt cleaner.

Conventionally, belt conveyors have been widely used as conveying devices for conveying bulk materials such as iron ore and lime. The belt conveyor includes a head pulley, a tail pulley, and a conveyor belt wrapped around the head pulley and the tail pulley. The conveyor belt runs from the tail pulley toward the head pulley and conveys the loose material as the conveyed object. After discharging the conveyed material at the head pulley, the conveyor belt runs toward the tail pulley.

When the conveyor belt returns from the head pulley to the tail pulley, the conveying surface of the conveyor belt is cleaned, for example by a scraping type belt cleaner. This belt cleaner uses a scraping chip to scrape off deposits such as conveyed objects remaining on the conveying surface of the conveyor belt, thereby removing them from the conveying surface. The deposits fall into a chute for conveyed objects, and are supplied together with the conveyed objects to a destination device or belt conveyor.

If the conveyance surface is insufficiently cleaned by the belt cleaner, deposits on the conveyance surface contact the return roller on the return side of the conveyor belt, fall, and accumulate on the ground or floor surface. As the accumulation of deposits progresses, there is a possibility that the deposits may interfere with the conveyor belt or return roller, or dust may be generated by the wind. Therefore, it is necessary to periodically clean the area below the conveyor belt. In order to deal with such problems, belt cleaners with high cleaning performance are required.

Patent Document 1 discloses a cleaning device that includes a scraping-type belt cleaner and a nozzle that sprays a mixed fluid of compressed air and liquid. The nozzle is arranged upstream of the belt cleaner in the direction of travel of the conveyor belt. The nozzles spray the mixed fluid over the entire surface of the conveyor belt. According to Patent Document 1, deposits on a conveyor belt can be almost completely removed using a nozzle that injects a mixed fluid.

Patent Document 2 discloses a belt cleaner that uses water to remove deposits. This belt cleaner presses a scraping member against a portion of the conveyor belt that is wrapped around a head pulley. The scraping member has two holes opening in the surface that is pressed against the conveyor belt, and a groove formed in the surface so as to connect the holes. While the conveyor belt is running, water is supplied to the conveying surface of the conveyor belt through the holes and grooves of the scraping member. According to Patent Document 2, by moistening the transport surface and the deposits thereon with water, peeling of the deposits from the transport surface is promoted.

Japanese Patent Application Publication No. 9-2638 Japanese Patent Application Publication No. 2001-315949

In Patent Document 1, a mixed fluid of compressed air and liquid is injected onto the conveying surface of the conveyor belt upstream of the belt cleaner. The deposits that cannot be completely removed by the mixed fluid are transported in a humidified and fluidized state to the belt cleaner, where they are scraped off from the conveying surface by a scraping tip of the belt cleaner. However, some of the deposits remain around the scraping tip and gradually accumulate. This deposit pushes up the conveyor belt, creating a gap between the conveying surface of the conveyor belt and the scraping chips. Therefore, it becomes impossible to sufficiently scrape off the deposits on the conveyance surface with the scraping chip, and the cleaning ability of the belt cleaner decreases.

In Patent Document 2, water is supplied between the scraping member and the conveying surface of the conveyor belt. Therefore, the conveyor belt is elastically deformed by the water pressure and becomes depressed, and the conveying surface is lifted off the scraping member, which may cause a gap between the conveying surface and the scraping member. In this case, the scraping member cannot sufficiently scrape off the deposits on the conveyance surface, and the cleaning ability of the belt cleaner decreases.

An object of the present disclosure is to provide a belt cleaner that can maintain high cleaning performance, and a conveyance facility using the belt cleaner.

A belt cleaner according to the present disclosure removes deposits from a conveying surface of a conveyor belt. The belt cleaner includes a scraping tip and a tip cleaning section. The scraping tip has a top surface, a front surface, and a corner. The upper surface is pressed against the conveyance surface. The front surface is connected to the edge of the upper surface on the upstream side in the running direction of the conveyor belt, and intersects with the running direction. The corner is formed by a top surface and a front surface. The chip cleaning section continuously supplies cleaning fluid to the corner.

According to the present disclosure, the cleaning ability of the belt cleaner can be maintained high.

FIG. 1 is a schematic diagram of a conveyance facility according to an embodiment. FIG. 2 is an enlarged view of the belt cleaner in the conveyance equipment shown in FIG. 1. FIG. 3 is a rear view of a flow path forming plate included in the belt cleaner shown in FIG. 2. FIG. FIG. 4 is a plan view of the channel configuration version. FIG. 5 is an enlarged top view of the belt cleaner shown in FIG. 2. FIG. 6 is an enlarged top view of a belt cleaner according to a modification of the above embodiment. FIG. 7 is a schematic diagram of a belt cleaner according to another modification of the above embodiment.

The belt cleaner according to the embodiment removes deposits from the conveyance surface of a conveyor belt. The belt cleaner includes a scraping tip and a tip cleaning section. The scraping tip has a top surface, a front surface, and a corner. The upper surface is pressed against the conveying surface. The front surface is connected to the edge of the upper surface on the upstream side in the running direction of the conveyor belt, and intersects with the running direction. The corner is formed by a top surface and a front surface. The chip cleaning section continuously supplies cleaning fluid to the corner (first configuration).

Among the scraping chips, the corner formed by the upper surface pressed against the conveying surface of the conveyor belt and the front surface disposed on the upstream side in the running direction of the conveyor belt is the first to come into contact with the deposits on the conveying surface. It is a part. In the belt cleaner according to the first configuration, the tip cleaning section continuously supplies cleaning fluid to this corner to clean the scraping tip. As a result, residue and accumulation of deposits around the scraping tip are suppressed, and the scraping tip is kept in a clean state. Therefore, the conveyor belt is not pushed up due to residual and accumulated deposits, and it is possible to suppress the formation of a gap between the conveying surface and the scraping chip. Further, since the cleaning fluid is not supplied between the conveying surface and the scraping chips, the conveying surface of the conveyor belt will not be lifted off from the scraping chips due to the pressure of the cleaning fluid. Therefore, the scraping chip can always sufficiently scrape off the deposits on the conveyance surface, and the cleaning ability of the belt cleaner can be maintained at a high level.

The chip cleaning section may include a first flow path. The first flow path allows the cleaning fluid to pass through and discharge toward the corner along the front surface of the scraping tip (second configuration).

According to the second configuration, the cleaning fluid is discharged from the first channel of the chip cleaning section along the front surface of the scraping chip toward the corner side. That is, the cleaning fluid is supplied to the corner from the vicinity of the scraping tip. Therefore, the front surface and corners of the scraping tip can be cleaned with a small amount of cleaning fluid. In addition, the cleaning fluid flows along the front surface of the scraping tip and prevents deposits that have fallen from the conveying surface from coming into contact with the front surface, so the scraping tip can be kept cleaner.

The chip cleaning section may further include a channel configuration plate. The flow path configuration plate is attached to the front surface of the scraping chip with a gap between the flow path configuration plate and the conveying surface. A first flow path is formed in the flow path configuration plate (third configuration).

According to the third configuration, the first flow path for the cleaning fluid can be provided by simply attaching the flow path configuration plate to the front surface of the scraping tip. Thus, there is no need to modify existing parts of the belt cleaner for the supply of cleaning fluid. Therefore, the manufacturing cost of the belt cleaner can be reduced.

The channel forming plate may include a groove. This groove is formed on the surface of the flow path forming plate, extends toward the end of the flow path forming plate on the conveying surface side, and opens at the end. The first flow path is configured by a groove (fourth configuration).

According to the fourth configuration, the first flow path is formed by the grooves on the surface of the flow path configuration plate. Therefore, the flow path configuration plate can be made thinner compared to a case where a hole is provided in the flow path configuration plate to form the first flow path. This makes it difficult for the deposits washed away by the cleaning fluid to stay on the flow path constituting plate, making it possible to keep the scraping chip and its surroundings more clean.

The chip cleaning section may further include a second flow path. The second channel allows the fluid to pass through and discharges the fluid to the conveying surface side. The second flow path may be arranged upstream of the first flow path in the traveling direction. In this case, the second flow path is preferably inclined so as to approach the first flow path toward the conveying surface (fifth configuration).

According to the fifth configuration, the chip cleaning section is provided with a second flow path. This second flow path slopes toward the conveying surface of the conveyor belt, approaching the first flow path for the cleaning fluid. Therefore, the fluid discharged from the second channel accelerates the cleaning fluid discharged from the first channel and guides it toward the scraping tip side. Thereby, the cleaning fluid can be more reliably supplied to the scraping tip. Further, since the accelerated cleaning fluid also hits the conveying surface immediately before the scraping tip, deposits on the conveying surface are easily peeled off. Therefore, the effect of scraping off deposits by the scraping tip can be improved.

The transport equipment according to the embodiment transports objects. The conveyance equipment includes a head pulley, a tail pulley, a conveyor belt, and the belt cleaner. The conveyor belt is wrapped around a head pulley and a tail pulley. The conveyor belt conveys the object from the tail pulley toward the head pulley, and then travels from the head pulley back to the tail pulley. A belt cleaner is located between the head pulley and the tail pulley on the return side of the conveyor belt.

Embodiments of the present disclosure will be described below with reference to the drawings. In each figure, the same or equivalent components are designated by the same reference numerals, and the same description will not be repeated.

[Conveyance equipment configuration]
FIG. 1 is a schematic diagram of a transport facility 100 according to an embodiment. The transport facility 100 transports bulk materials such as iron ore and lime, for example. As shown in FIG. 1, the conveyance equipment 100 includes a plurality of pulleys 10, a conveyor belt 20, and a belt cleaner 30. The plurality of pulleys 10 include a head pulley 11, a tail pulley 12, and a snub pulley 13.

The conveyor belt 20 conveys loose materials as objects to be conveyed. The conveyor belt 20 is, for example, an endless flat belt. The conveyor belt 20 is wound around the head pulley 11 and the tail pulley 12. The outer surface of the conveyor belt 20 wound around the head pulley 11 and the tail pulley 12 is a conveyance surface 21 on which objects to be conveyed are placed. The conveyor belt 20 runs as the head pulley 11 is driven by a drive device (not shown) and the head pulley 11 and tail pulley 12 rotate around a rotation axis. In this embodiment, upstream and downstream in the running direction of the conveyor belt 20 are simply referred to as upstream and downstream.

The conveyor belt 20 transports the object from the tail pulley 12 toward the head pulley 11 and then travels back from the head pulley 11 to the tail pulley 12. The conveyor belt 20 runs from the tail pulley 12 to the head pulley 11 with the object placed on the conveyance surface 21. The conveyor belt 20 turns back around the head pulley 11 and runs toward the tail pulley 12 while discharging the conveyed object. In the conveyor belt 20, the side that conveys the object from the tail pulley 12 toward the head pulley 11 is the conveyance side, and the side that returns from the head pulley 11 to the tail pulley 12 is the return side. The conveyance side of the conveyor belt 20 is supported by, for example, a plurality of carrier rollers (not shown). The return side of the conveyor belt 20 is supported by, for example, a plurality of return rollers (not shown). A snub pulley 13 is provided on the return side of the conveyor belt 20 in order to adjust the winding angle of the conveyor belt 20 around the head pulley 11.

The belt cleaner 30 removes deposits on the conveying surface 21 of the conveyor belt 20. The belt cleaner 30 is arranged between the head pulley 11 and the tail pulley 12 on the return side of the conveyor belt 20. In the example of this embodiment, the belt cleaner 30 is arranged downstream of the head pulley 11 and upstream of the snub pulley 13. However, the belt cleaner 30 may be arranged downstream of the snub pulley 13.

[Configuration of belt cleaner]
FIG. 2 is an enlarged view of the belt cleaner 30 in the conveyance equipment 100 shown in FIG. The belt cleaner 30 is configured to approach and move away from the conveyance surface 21 of the conveyor belt 20. For example, an elevating device (not shown) raises the belt cleaner 30 so that the belt cleaner 30 approaches the conveying surface 21, and the elevating device lowers the belt cleaner 30 so that the belt cleaner 30 separates from the conveying surface 21. Hereinafter, regarding the belt cleaner 30, the conveying surface 21 side will be referred to as the upper side, and the opposite side will be referred to as the lower side.

Referring to FIG. 2, belt cleaner 30 includes a cleaner body 31, a tip holder 32, a scraping tip 33, and a tip cleaning section 34.

The cleaner body 31 includes a pedestal 311 and a support plate 312. The pedestal 311 is made of an elastic material such as rubber, for example. The shape of the base 311 is not particularly limited. The pedestal 311 is covered from the upstream side by a sheet-like cover 35. The support plate 312 projects upward from the base 311. The support plate 312 is, for example, a rectangular plate, and has a front surface 3121 and a back surface 3122. The front surface 3121 is located upstream of the back surface 3122. The back surface 3122 is a surface facing opposite to the front surface 3121.

The chip holder 32 is fixed to the front surface 3121 of the support plate 312 by, for example, a fastening member 36. The chip holder 32 has a generally plate shape. In this embodiment, the longitudinal cross section of the tip holder 32 (the cross section parallel to the vertical direction and the plate thickness direction) is substantially rectangular.

Chip holder 32 has a front surface 321 and a back surface 322. The front surface 321 is located upstream of the rear surface 322. A notch 323 is formed at the upper end of the front surface 321. The back surface 322 is a surface opposite to the front surface 321 and faces the front surface 3121 of the support plate 312.

Tip holder 32 holds at least one scraping tip 33. Typically, a plurality of scraping tips 33 are held by tip holder 32. The plurality of scraping chips 33 are arranged, for example, along the width direction of the chip holder 32 (direction perpendicular to the paper surface of FIG. 2). The scraping tip 33 is placed within the cutout 323 of the tip holder 32. The scraping tip 33 projects upward from the tip holder 32.

The scraping tip 33 is made of a wear-resistant material such as a superalloy or ceramic. The scraping tip 33 has a generally plate shape. In this embodiment, the vertical cross section of the scraping tip 33 (a cross section parallel to the vertical direction and the plate thickness direction) has a substantially rectangular shape. The shape of the longitudinal section of the scraping tip 33 is constant over the entire scraping tip 33. The scraping tip 33 has a front surface 331, a back surface 332, an upper surface 333, and a corner portion 334.

The front surface 331 is located upstream of the rear surface 332. In this embodiment, since the scraping tip 33 is disposed within the notch 323 of the tip holder 32, the front surface 331 of the scraping tip 33 is located on substantially the same plane as the front surface 321 of the tip holder 32. The back surface 332 is a surface facing opposite to the front surface 331. The front surface 331 and the rear surface 332 intersect with the running direction of the conveyor belt 20. For example, the front surface 331 and the rear surface 332 are arranged substantially parallel to the width direction of the conveyor belt 20. The front surface 331 and the rear surface 332 may be inclined with respect to the width direction of the conveyor belt 20.

The upper surface 333 faces the transport surface 21 of the conveyor belt 20 . The upper surface 333 connects the front surface 331 and the rear surface 332. The front surface 331 is connected to the upstream edge of the upper surface 333 . A corner portion 334 is formed by the front surface 331 and the upper surface 333. That is, the intersection line between the front surface 331 and the upper surface 333 is the corner portion 334 . A back surface 332 is connected to the downstream edge of the upper surface 333 .

The tip cleaning section 34 has a function of cleaning the scraping tip 33. The chip cleaning section 34 includes a channel configuration plate 341 and channels 342 and 343.

The flow path forming plate 341 is arranged on the upstream side of the scraping chip 33. The flow path forming plate 341 is attached to the front surface 331 of the scraping chip 33 with a gap between it and the conveyance surface 21 . The channel forming plate 341 may be directly fixed to the front surface 331 of the scraping chip 33, or may be indirectly fixed to the front surface 331. That is, the channel forming plate 341 may be arranged so that the relative positional relationship with the scraping tip 33 does not change. In this embodiment, the flow path configuration plate 341 is attached to the front surface 331 of the scraping tip 33 by being fixed to the chip holder 32 holding the scraping tip 33 and the support plate 312 with a fastening member 36 . The fastening member 36 fastens the cover 35, the channel forming plate 341, the chip holder 32, and the support plate 312. The upper end portion of the channel forming plate 341 is positioned below the upper surface 333 and corner portion 334 of the scraping tip 33.

The flow path configuration plate 341 has a front surface 3411 and a back surface 3412. The front surface 3411 is located upstream of the rear surface 3412. The top of the front surface 3411 is sloped relative to the back surface 3412. A groove 3431 is formed in the front surface 3411. A plate-shaped lid 344 is adhered to the front surface 3411. The back surface 3412 is a surface facing opposite to the front surface 3411. The back surface 3412 contacts the front surface 321 of the tip holder 32 and the front surface 331 of the scraping tip 33. However, other members may be interposed between the back surface 3412 and the tip holder 32 and scraping tip 33. A groove 3421 is formed in the back surface 3412.

The flow path 342 allows a cleaning fluid, which may be a liquid or a gas, to pass therethrough. The flow path 342 discharges the cleaning fluid along the front surface 331 of the scraping tip 33 toward the corner 334 side. The flow path 342 is formed in the flow path configuration plate 341. Specifically, the flow path 342 is configured by the groove 3421 of the flow path configuration plate 341. The flow path 342 is defined by a groove 3421 provided on the back surface 3412 of the flow path configuration plate 341, the front surface 321 of the tip holder 32, and the front surface 331 of the scraping tip 33.

The flow path 343 allows the same or different fluid as the cleaning fluid to pass therethrough and discharges it to the conveying surface 21 side. The fluid passing through the channel 343 may be a liquid or a gas, but is typically a gas such as air. The flow path 343 is arranged upstream of the cleaning fluid flow path 342 and is inclined toward the flow path 342 as it approaches the conveyance surface 21 . The flow path 343 is formed in the flow path configuration plate 341. Specifically, the flow path 342 is configured by a groove 3431 of the flow path configuration plate 341. The flow path 343 is defined by a groove 3431 provided on the front surface 3411 of the flow path configuration plate 341 and a lid 344 . The cross-sectional area (channel area) of the channels 342 and 343 can be set as appropriate, but due to the difference in specific gravity between the liquid and gas, the piping resistance of the liquid is approximately 1000 times the piping resistance of the gas. When the fluid passing through 342 and 343 is a liquid, it is preferable to make the flow path area as large as possible.

With reference to FIGS. 3 and 4, the configuration of the flow path configuration plate 341 will be described in more detail. FIGS. 3 and 4 are a rear view and a plan view of the flow path configuration plate 341, respectively. In FIG. 4, the scraping tip 33 and the lid 344 are also shown together with the flow path configuration plate 341.

As shown in FIG. 3, a groove 3421 is formed on the back surface 3412 of the flow path forming plate 341. The groove 3421 includes a plurality of grooves 3421a and a groove 3421b. Each of the grooves 3421a extends in the vertical direction and opens at the upper end of the flow path configuration plate 341. The grooves 3421b extend in the width direction of the channel forming plate 341 and connect the grooves 3421a. Each of the grooves 3421a is connected to a cleaning fluid supply 3415 via a groove 3421b. The supply portion 3415 is a recess formed in the back surface 3412.

A groove 3431 is formed in the front surface 3411 of the flow path forming plate 341. The groove 3431 includes a plurality of grooves 3431a and a groove 3431b. Each of the grooves 3431a extends in the vertical direction and opens at the upper end of the flow path configuration plate 341. The grooves 3431b extend in the width direction of the channel forming plate 341 and connect the grooves 3431a. Each of the grooves 3431a is connected to the fluid supply section 3416 via a groove 3431b. The supply portion 3416 is a through hole that penetrates the flow path configuration plate 341.

Referring to FIG. 4, the cross-sectional shapes of grooves 3421 and 3431 are, for example, semicircular, semielliptic, or the like. The flow path 343 formed by the grooves 3431 is inclined toward the upper end of the flow path forming plate 341 so as to approach the cleaning fluid flow path 342 formed by the grooves 3421. In this embodiment, since the upper part of the front surface 3411 of the flow path forming plate 341 is inclined with respect to the back surface 3412, the grooves 3431 on the front surface 3411 also become grooves on the back surface 3412 as they move toward the upper end of the flow path forming plate 341. 3421.

When the front surface 3411 of the flow path forming plate 341 is parallel to the back surface 3412, for example, each groove 3431a becomes deeper toward the upper end of the flow path forming plate 341, and the bottom of each groove 3431a approaches the back surface 3412. do it. As a result, the flow path 343 is inclined toward the upper end of the flow path forming plate 341 so as to approach the flow path 342 of the cleaning fluid.

[Belt cleaner operation]
The operation of the belt cleaner 30 will be described with reference to FIG. 5. FIG. 5 is an enlarged top view of the belt cleaner 30 in use. When the conveyor belt 20 is running, the upper surface 333 of the scraping chips 33 is pressed against the conveying surface 21 on the return side of the conveyor belt 20. The scraping chip 33 scrapes and removes adhesion such as conveyed objects remaining on the conveying surface 21 from the conveying surface 21. The deposits scraped off by the scraping chip 33 enter a chute (not shown) for conveyed objects, and are supplied together with the conveyed objects to a destination device or belt conveyor.

While the scraping tip 33 is removing deposits from the conveying surface 21 , the chip cleaning section 34 continuously supplies cleaning fluid to the corner 334 of the scraping tip 33 . Cleaning fluid may be supplied to corner 334 substantially continuously during travel of conveyor belt 20 . That is, the cleaning fluid may be supplied to the corner portion 334 without interruption, or may be supplied intermittently at short intervals. The cleaning fluid is supplied to the flow path 342 of the flow path configuration plate 341 via the piping 37 connected to the supply section 3415. The cleaning fluid is typically water or steam. For example, miscellaneous water used for cleaning the area around the transport facility 100 can be used as the cleaning fluid. The cleaning fluid supplied to the flow path 342 may be subjected to pressure oscillations. The cleaning fluid passes through the flow path 342 and is discharged from the upper end of the flow path configuration plate 341.

The chip cleaning section 34 discharges fluid together with the cleaning fluid from the upper end of the flow path forming plate 341 . Preferably, this fluid is compressed air. For example, compressed air is supplied to the flow path 343 of the flow path configuration plate 341 continuously or intermittently in short cycles by a known fan and compressor (not shown) connected to the supply unit 3416. However, it is also possible to supply fluid other than compressed air to the flow path 343, such as water or steam. The fluid passes through the flow path 343 and is discharged from the upper end of the flow path configuration plate 341.

After the cleaning fluid is discharged from the channel 342, it reaches the corner 334 along the front surface 331 of the scraping tip 33. On the other hand, the fluid discharged from the channel 343 flows so as to push the cleaning fluid toward the scraping tip 33 side. This fluid accelerates the cleaning fluid towards the corner 334 of the scraping tip 33.

The front surface 331 and corners 334 of the scraping tip 33 are constantly cleaned by the continuously supplied cleaning fluid. When the cleaning fluid is water, the cleaning fluid discharged from the channel 342 washes away the front surface 331 and the corners 334 . When the cleaning fluid is water vapor, the cleaning fluid discharged from the flow path 342 immediately turns into water droplets upon contact with the air, and washes away the front surface 331 and the corners 334. That is, the cleaning fluid may be a gas when it is discharged from the channel 342, but is partially liquid when it reaches the scraping tip 33. The cleaning fluid once accumulates at the corner between the front surface 331 of the scraping chip 33 and the flow path forming plate 341, and then falls from the flow path forming plate 341 together with the deposits scraped off by the scraping chip 33.

[Effects of embodiment]
In the belt cleaner 30 according to the present embodiment, the front surface 331 and the corner 334 of the scraping tip 33 are constantly cleaned by the tip cleaning section 34 continuously supplying cleaning fluid to the corner 334 of the scraping tip 33. ing. Therefore, the deposits on the conveying surface 21 of the conveyor belt 20 do not remain or accumulate on the front surface 331 of the scraping chip 33 and its surroundings. Therefore, the conveyor belt 20 is not pushed up by residual and accumulated deposits, and it is possible to prevent a gap from forming between the conveyance surface 21 and the scraping tip 33. Further, since the cleaning fluid is not supplied between the scraping tip 33 and the conveying surface 21 but toward the corner 334 on the upstream side of the scraping tip 33, the cleaning fluid is conveyed by the pressure of the cleaning fluid. The surface 21 does not rise up from the scraping tip 33. As a result, the scraping chip 33 can always sufficiently scrape off the deposits on the conveyance surface 21, and the cleaning ability of the belt cleaner 30 can be maintained at a high level.

In this embodiment, the cleaning fluid is supplied to the corner 334 of the scraping tip 33. Therefore, just before the scraping chip 33 scrapes off the deposits, the cleaning fluid also hits the conveying surface 21. Thereby, the deposits on the conveyance surface 21 can be easily peeled off, and the scraping efficiency of the scraping tip 33 can be improved.

For example, as described in Patent Document 1, when cleaning fluid is injected toward the conveying surface of a conveyor belt from a position away from the scraping chip on the upstream side of the scraping chip to remove deposits, Large amounts of cleaning fluid are required. Furthermore, post-processing of the cleaning fluid, such as separation of deposits mixed in the cleaning fluid after injection, requires large-scale equipment. Furthermore, when using a large amount of cleaning fluid, the moisture content of the conveyed material may increase, exceeding the moisture limit at the destination, or the humidified and fluidized material may adhere to the surface of the chute. This causes problems such as the need to clean the chute.

In contrast, in the belt cleaner according to the present embodiment, the cleaning fluid is discharged from the flow path 342 along the front surface 331 of the scraping tip 33 toward the corner 334 side. That is, the cleaning fluid is supplied to the corner 334 from a position close to the scraping tip 33. Therefore, the front surface 331 and corner portion 334 of the scraping tip 33 can be cleaned with a small amount of cleaning fluid. Therefore, there is no need to provide large-scale water treatment equipment for post-treatment of the cleaning fluid, and there are almost no problems such as exceeding restrictions on the moisture content of the conveyed material or the necessity of cleaning the chute.

In this embodiment, since the cleaning fluid flows along the front surface 331 of the scraping tip 33, the deposits scraped off from the conveyance surface 21 do not fall along the front surface 331. Therefore, the deposits scraped off from the conveyance surface 21 do not contact and adhere to the scraping tip 33, and the scraping tip 33 can always be kept clean.

In this embodiment, a flow path 342 for cleaning fluid and a flow path 343 for air, etc. are formed using a flow path configuration plate 341. Therefore, there is no need to significantly change existing parts of the belt cleaner 30, such as the cleaner main body 31, for example, to accommodate the flow passages 342 and 343. Therefore, the manufacturing cost of the belt cleaner 30 can be reduced.

In this embodiment, the grooves 3421 formed on the back surface 3412 of the flow path configuration plate 341 configure the flow path 342 for the cleaning fluid, and the grooves 3431 formed on the front surface 3411 of the flow path configuration plate 341 configure the flow path 342 for the cleaning fluid. A flow path 343 is configured. Thereby, the thickness of the flow path forming plate 341 can be reduced compared to the case where the flow paths 342 and 343 are formed by holes provided in the flow path forming plate 341. When the thickness of the channel forming plate 341 is small, cleaning fluid and deposits are less likely to stay at the corner between the front surface 331 of the scraping tip 33 and the channel forming plate 341. Therefore, the deposits scraped off by the scraping chip 33 can be quickly dropped from the channel forming plate 341 together with the cleaning fluid. Therefore, the scraping tip 33 can be kept cleaner.

In this embodiment, the flow path 343 slopes toward the corner 334 of the scraping tip 33 so as to approach the cleaning fluid flow path 342 . Therefore, the fluid such as air released from the flow path 343 accelerates the cleaning fluid released from the flow path 342 and presses it against the scraping tip 33 side. Therefore, the cleaning fluid can be supplied to the scraping tip 33 more reliably.

In this embodiment, the cleaning fluid accelerated by a fluid such as air is also supplied to the conveying surface 21 of the conveyor belt 20 . Thereby, the deposits on the conveyance surface 21 are easily peeled off, so that the effect of scraping the deposits by the scraping chip 33 can be improved.

The belt cleaner 30 according to this embodiment is arranged between the head pulley 11 and the tail pulley 12 on the return side of the conveyor belt 20. That is, the scraping tip 33 is pressed against a portion of the conveyor belt 20 where the amount of deformation depends only on the belt tension. Therefore, the conveyor belt 20 can be easily deformed by the scraping chip 33, and the amount of deformation of the conveyor belt 20 can be adjusted by adjusting the strength with which the scraping chip 33 is pressed. When cleaning fluid is supplied toward the corner 334 with the scraping tip 33 pressed against the conveyor belt 20 to deform it, the cleaning fluid hits the bending part of the conveyor belt 20 and removes the unevenness existing on the conveying surface 21. The deposits that have entered the recessed portion 22 (FIG. 5) are washed away. That is, on the conveyance surface 21, it is also possible to remove deposits within the concave portions 22 that are difficult for the scraping tip 33 to reach. Therefore, the cleaning ability of the belt cleaner 30 can be improved.

Although the embodiments according to the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various changes can be made without departing from the spirit thereof.

In the belt cleaner 30 according to the embodiment described above, the chip cleaning section 34 includes a flow path forming plate 341 that forms a flow path 342 for cleaning fluid and a flow path 343 for air or the like. However, the chip cleaning section 34 does not need to include the channel configuration plate 341. For example, as in the belt cleaner 40 shown in FIG. 6, a flow path 342 may be formed in the tip holder 42.

FIG. 6 is an enlarged top view of the belt cleaner 40, and is a view of the belt cleaner 40 viewed from the upstream side. In FIG. 6, the fastening member 36 (FIG. 5) is omitted.

As shown in FIG. 6, the chip holder 42 includes a plurality of holes 421, a header section 422, a mixing section 423, and a premixing section 424. Each hole 421, header section 422, mixing section 423, and premixing section 424 constitute a flow path 342. The header section 422, the mixing section 423, and the premixing section 424 are spaces provided within the tip holder 42 and extending in the width direction of the tip holder 42, respectively. The header section 422, the mixing section 423, and the premixing section 424 communicate with each other via the connecting section 425. Each hole 421 extends upward from the header portion 422 and opens at the upper end of the chip holder 42 .

The cleaning fluid passes through the pipe 37 and is supplied to the premixing section 424 of the tip holder 42 . Fluid such as air is supplied to premixing section 424 through piping 38 and joins with the cleaning fluid. These fluids are mixed while passing through the mixing section 423 and the header section 422. The mixed fluid of cleaning fluid, air, etc. passes through each hole 421 and is discharged from the upper end of the tip holder 42 along the front surface 331 of the scraping tip 33 toward the corner 334 side.

In this way, in the belt cleaner 40, a mixed fluid of cleaning fluid, air, etc. is discharged from the tip holder 42. However, the chip holder 42 may be configured to separately discharge the cleaning fluid and the fluid such as air, like the flow path configuration plate 341 in the above embodiment. That is, the chip holder 42 may have a flow path 343 for fluid such as air, in addition to the flow path 342. Note that the method of mixing the cleaning fluid and air etc. in the belt cleaner 40 is merely an example, and is not particularly limited thereto.

In the embodiment described above, the chip cleaning section 34 has a flow path 343 in addition to the flow path 342 for the cleaning fluid. However, the chip cleaning section 34 may include only the cleaning fluid flow path 342. In this case, the cleaning fluid discharged from the flow path 342 may be water or steam. When the cleaning fluid is a liquid (water), it is preferable to discharge the cleaning fluid from the channel 342 in a mixed state with a gas such as air.

In the embodiment described above, the tip cleaning section 34 discharges the cleaning fluid along the front surface 331 of the scraping tip 33 toward the corner 334 side. However, the cleaning fluid does not necessarily have to be supplied along the front surface 331 of the scraping tip 33. That is, the chip cleaning section 34 does not need to have the flow path 342 for the cleaning fluid. For example, like the belt cleaner 50 shown in FIG. 7, the tip cleaning section 34 may include an injection device 345 provided upstream of the scraping tip. The spray device 345 can also spray the cleaning fluid or a mixed fluid of the cleaning fluid and a gas such as air toward the corner of the scraping tip.

In the embodiment described above, the scraping tip 33 has a substantially rectangular longitudinal section. However, the shape of the scraping tip 33 is not limited to this. For example, in a longitudinal cross-sectional view of the scraping tip 33, the back surface 332 may be shorter than the front surface 331, or the back surface 332 may be curved.

100: Conveyance equipment 11: Head pulley 12: Tail pulley 20: Conveyor belt 21: Conveyance surface 30, 40, 50: Belt cleaner 33: Scraping chip 331: Front surface 333: Top surface 334: Corner 34: Chip cleaning section 341: Flow Path configuration plate 342, 343: Channel 3421, 3431: Groove

Claims (5)

A belt cleaner for removing deposits from a conveying surface of a conveyor belt,
an upper surface that is pressed against the conveyance surface; a front surface that is connected to an edge of the upper surface on the upstream side in the running direction of the conveyor belt and intersects with the running direction; and a corner formed by the upper surface and the front surface. and a scraping tip having;
a chip cleaning section that continuously supplies cleaning fluid to the corner;
Equipped with
The chip cleaning section is
a first channel through which the cleaning fluid passes and is discharged along the front surface to the corner side;
Including belt cleaner. The belt cleaner according to claim 1 ,
The chip cleaning section further includes:
a flow path configuration plate that is attached to the front surface with a gap between it and the conveyance surface, and on which the first flow path is formed;
Including belt cleaner. The belt cleaner according to claim 2 ,
The flow path configuration plate is
a groove formed on the surface of the flow path forming plate, extending toward the end of the flow path forming plate on the conveying surface side and opening at the end;
including;
A belt cleaner, wherein the first flow path is constituted by the groove. The belt cleaner according to any one of claims 1 to 3 ,
The chip cleaning section further includes:
A second flow path through which fluid passes and is discharged toward the conveying surface, the second flow path being disposed upstream of the first flow path in the traveling direction and approaching the first flow path toward the conveying surface. The second flow path is inclined as shown in FIG.
Including belt cleaner. Conveyance equipment that conveys conveyed objects,
head pulley and
tail pulley and
a conveyor belt that is wound around the head pulley and the tail pulley, and runs so as to transport the object from the tail pulley toward the head pulley and then return from the head pulley to the tail pulley;
The belt cleaner according to any one of claims 1 to 4 , disposed between the head pulley and the tail pulley on the return side of the conveyor belt;
Conveyance equipment equipped with.

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