At present, belt conveyors are widely used in mining, metallurgy, coal, and other industries. Because their installation accuracy is not as demanding as precision equipment such as machine tools and large motors, some users will choose to do it themselves. However, the installation of the belt conveyor is not without precision requirements. Once a problem occurs, it will bring unnecessary trouble to the subsequent debugging and acceptance work, and it is also easy to cause accidents such as tape deviation during production. The installation of the belt conveyor can be roughly divided into the following steps.
1. Preparation Before Installation
First, be familiar with the drawings. By looking at the drawings, understand important information such as the structure of the equipment, the installation form, the composition and quantity of parts, and performance parameters. Then familiarize yourself with important installation dimensions and technical requirements on the drawings. If there is no special installation requirement, the general technical requirements of the belt conveyor are as follows.
(1) The centerline of the frame and the longitudinal centerline of the conveyor should coincide with the deviation not greater than 2mm.
(2) The straightness deviation of the frame centerline should not be greater than 5mm within any 25m length.
(3) The vertical deviation of the frame legs to the ground should not be greater than 2/1000.
(4) The allowable deviation of the spacing of the intermediate frame is plus or minus 1.5mm, and the height difference should not be greater than 2/1000 of the spacing.
(5) The horizontal centerline of the roller and the longitudinal centerline of the conveyor should coincide with the deviation not greater than 2mm.
(6)The vertical deviation between the roller axis and the longitudinal centerline of the conveyor should not be greater than 2/1000, and the horizontal deviation should not be greater than 1/1000.
2. Installation of Equipment
Whether a belt conveyor can meet the design and installation requirements and run normally and smoothly depends on the installation accuracy of the drive device, drum, and tail wheel. Whether the center of the belt conveyor bracket coincides with the centerline of the drive device and tail wheel, so the installation Pay-off is particularly important.
(1) Pay off
We can use a theodolite to mark between the nose (driving device) and the tail (tailwheel), and then use the ink fountain to bounce the line point by point to connect the centerline between the nose and the tail into a straight line. The wire can guarantee higher installation accuracy.
(2) Installation of the drive device
The driving device is mainly composed of a motor, a reducer, a driving roller, and a bracket.
First, we assemble and place the drive roller and the bracket on the embedded plate, place a steel backing plate between the embedded plate and the bracket, and level it with a level to ensure that the levelness between the four points of the bracket is less than or equal to 0.5mm.
Then, find the center dividing line of the driving drum, place the wire drop on the middle dividing line, and adjust the longitudinal and horizontal middle dividing lines of the driving drum to coincide with the base centerline.
When adjusting the elevation of the driving drum, a certain margin should be reserved for the adjustment of the elevation of the motor and reducer. Since the connection between the motor and the reducer has been adjusted on the bracket during the equipment manufacturing, our task is to align and level and to ensure the coaxial between the reducer and the drive drum.
(3) Installation of a tail wheel
The tail wheel is composed of a bracket and a roller, and the adjustment steps are the same as those of the driving roller.
(4) Installation of outriggers, an intermediate frame, roller support, and roller
Most of the belt conveyor legs are H-shaped, and their length and width vary according to the belt length and width, belt transportation volume, etc.
3. Installation of Accessories and Safety Devices
The installation of accessories can only be carried out after putting a belt on the bracket. Accessories include guide chute, empty section cleaner, head cleaner, anti-deflection switch, chute, belt tensioner, etc.
(1) Chute and guide trough
The chute is installed on the blanking opening, the lower part is connected with the material guide groove, and the material guide groove is installed on the top of the tail belt. The mineral material enters the chute from the discharge port, and then enters the guide trough from the chute. The guide trough evenly distributes the mineral material in the center of the belt to prevent the mineral material from splashing.
The empty section cleaner is installed on the lower belt of the machine tail to clean the mineral material of the lower belt. The head cleaner is installed at the lower part of the head drum to clean the upper belt mineral material.
(3) Tensioning device
The tension device is divided into spiral tension, vertical tension, horizontal car type tension, and so on. The screw tensioner is integrated with the tail bracket, composed of a nut and a screw, and is generally used for short belts. Vertical tensioning and cart-style tensioning are used for longer belts.
(4) Installation device
Safety devices include head guards, tail guards, rope switches, etc. The safety device is installed on the rotating part of the belt conveyor to protect it.
After the above methods and steps of operation, and to ensure a certain accuracy range, through the no-load and load test, and adjust the belt deviation, you can run smoothly and safely.
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