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Difference between revisions of "Belt Scrapers"
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==Types of Belt Scrapers == | ==Types of Belt Scrapers == | ||
===Primary | ===Primary Belt Cleaners or Precleaners=== | ||
Primary | [[Primary Belt Cleaners]] or [[PreCleaners]] are an essential part of any conveyor system. Belt cleaners help remove bulk material product carry back and prevent it from falling off at various points of the conveyor along the return side of the belt causing various housekeeping and conveyor belt maintenance problems. These are installed at a positive angle, these primary belt cleaners would be mounted directly against the head pulley below the normal trajectory path of the material. | ||
* Mounted on the head pulley. | * Mounted on the head pulley. | ||
* Mounted below the material flow. | * Mounted below the material flow. | ||
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===Secondary Belt Cleaners=== | ===Secondary Belt Cleaners=== | ||
Secondary Belt Cleaners move bulk material product build-up and prevent it from falling off at different points of the conveyor. Points along the return side of the belt can cause various conveyor belt maintenance problems due to carry-back. Installed after the point where the belt leaves the head (discharge) pulley and or anywhere on the return side of the belt where it can be cleaned and maintained effectively. | [[Secondary Belt Cleaners]] move bulk material product build-up and prevent it from falling off at different points of the conveyor. Points along the return side of the belt can cause various conveyor belt maintenance problems due to carry-back. Installed after the point where the belt leaves the head (discharge) pulley and or anywhere on the return side of the belt where it can be cleaned and maintained effectively. | ||
* Special secondaries may allow for mounting under the head pulley. | * Special secondaries may allow for mounting under the head pulley. | ||
* Blade width is always the belt width or wider. | * Blade width is always the belt width or wider. | ||
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==Function, Cleaning and Care== | ==Function, Cleaning and Care== | ||
*Primary Belt Cleaners:The function of the primary cleaner is to "scalp" the belt of the coarse carry back materials which would otherwise overload the secondary and tertiary cleaners. In terms of volume, the primary cleaner is responsible for the removal of up to 75% of the total carry back and is an essential part of the system. It has the added advantage of placing the carry back directly into the flow of material. The course materials do not cause a problem of carry back. This is normally because of the fine and sticky particles in the mix of material. These fine and sticky particles are removed by the secondary and | *Primary Belt Cleaners:The function of the primary cleaner is to "scalp" the belt of the coarse carry back materials which would otherwise overload the secondary and tertiary cleaners. In terms of volume, the primary cleaner is responsible for the removal of up to 75% of the total carry back and is an essential part of the system. It has the added advantage of placing the carry back directly into the flow of material. The course materials do not cause a problem of carry back. This is normally because of the fine and sticky particles in the mix of material. These fine and sticky particles are removed by the secondary and [[Tertiary Cleaners]]. | ||
*Secondary Belt Cleaners: The function of the secondary cleaner is to remove fine and sticky materials from the belt after the primary cleaner has removed the course carry back. In terms of volume removed, the secondary cleaner does not appear to be as effective as the primary cleaner. However, this does not ring true when looking at the mess around a conveyor or the build-up on return rollers. It is the fine and sticky material that is responsible for the mess as it is particularly hard to remove. In many cases, it is necessary to apply water to the belt in front of the secondary cleaner to achieve the required result. | *Secondary Belt Cleaners: The function of the secondary cleaner is to remove fine and sticky materials from the belt after the primary cleaner has removed the course carry back. In terms of volume removed, the secondary cleaner does not appear to be as effective as the primary cleaner. However, this does not ring true when looking at the mess around a conveyor or the build-up on return rollers. It is the fine and sticky material that is responsible for the mess as it is particularly hard to remove. In many cases, it is necessary to apply water to the belt in front of the secondary cleaner to achieve the required result. | ||