Conveyors Flashcards
What are the four basic components that make up a belt conveyor?
- frame with carrying and return idlers
- drive (head) pulley
- return (tail) pulley
- tensioning device
On belt conveyor, this component transmits power to the belt and is always located at the discharge end.
The head pulley
The point of highest tension on a belt is right before the head pulley.
On a belt conveyor, what is the point of highest tension on the belt?
Right before the head pulley
On a belt conveyor, which pulley is located on the discharge end of the coveyor?
The head pulley
On a belt conveyor, which pulley is located at the intake end of the coveyor?
The tail pulley
This is usually where the tensioning device is installed.
What are two types of bends introduced into belt conveyor frames when moving material up or down an incline?
- convex bends
- concave bends
Which conveyor system has the lease cost per tonnage?
Belt conveyors
This, along with their ability to conform to local conditions, makes them one of the most flexible and widely used transportation systems.
On a belt conveyor system, what is a tripper?
A device that allow discharge of material from the side of a belt conveyor
At either selected points, or any point along the length of the conveyor.
This belt conveyor component is usually a frame that supports a series of idlers, head pulley and a tail and snub pulley, which elevates the main belt over the frame allowing material to discharge into a chute or transverse belt.
A tripper
True or false: A belt conveyor tripper may be self-propelled or attached to a stacker.
True
This component of a belt conveyor system is used to provide a constant stream of material to the belt.
Feeders
These ensure that there aren’t unloaded or overloaded spots along the belt, which can result in spillage when excess material falls from the edge of the belt.
What are three accessories that can be use with belt conveyor feeders to know the tonnage rate delivered to the conveyor?
- variable feed drives
- adjustable feed gates
- load cells
True or false: Belt conveyor feeder belts are a lot wider than regular conveyor belts and tend to be flat.
True
The feeder belt may have raised edges to prevent spillage.
Where are the highest wear points on belt conveyors?
At the loading points
This is where the most impact and abrasion occurs.
What is done with belt conveyors to reduce the impact and abrasion that occurs from loading material onto the belt?
Load the material at the same speed and in the same direction as the belt
This can be done with transition conveyors and/or chutes.
When loading belt conveyors, why is it a good idea to load the belt as close to the centre of the belt as possible?
To prevent tracking issues.
The belt can move to one side due to impact force
On belt conveyors, loading and unloading is done in the ________ zones.
transfer zones
What are the four main advantages of transition belt conveyors?
- correctly position the material
- impact force reduction
- shorter belt ⟶ ease of maintenance
- can be fitted with load cells
How do transition conveyor belts help to eliminate tracking problems?
By loading the material into the centre of the main belt
How do transition conveyor belts reduce the impact loading forces on the main belt?
By reducing the transfer height
The transition belt takes the large impact forces.
On belt conveyor systems, after the feed rate has been established, this accessory is used to control the direction, speed and placement of the material on the main belt.
In-line chutes
On belt conveyor systems with in-line chutes, the chute is angled and extended in the direction of belt travel. Why is this?
To direct the material onto the centre of the belt at close to belt speed.
This reduces impact and abrasion damage done to the belt.
On belt conveyor systems with in-line chutes, why is the material directed to the centre of the belt at close to belt speed?
To reduce impact and abrasion damage done to the main belt.
On a belt conveyor system, what type of chute is required if the receiving conveyor is positioned to an angle to the unloading conveyor?
A side loading chute
This type of chute requires more space to redicect the material to the receiving conveyor, which results in a greater height difference between conveyors when compared to in-line chutes.