Manufacturer's direct selling belt conveyo

  1
introduction to belt conveyor:
The belt conveyor has the advantages of large conveying capacity, simple structure, convenient maintenance, standardized components, etc
it is widely used in mining, metallurgy, coal and other industries to transport loose materials or finished goods
According to the requirements of the conveying process, it can be transported by a single machine, or it can be composed of multiple machines, or it can form a horizontal or inclined conveying system with other conveying equipment, so as to meet the needs of different layout types of operation lines, It is suitable for conveying powdery, granular and small pieces of low abrasive materials and bagged materials with a bulk density of less than 1
67/ ton / cubic meter, such as coal, gravel, sand, cement, chemical fertilizer, grain, etc
The temperature of the delivered material is less than 60 ℃
Its length and assembly form can be determined according to the user's requirements
The drive can be either an electric roller or a drive device with a drive frame

Belt conveyors have various structural forms, including trough belt conveyor, flat belt conveyor, climbing belt conveyor, side inclined belt conveyor, turning belt conveyor, etc

The commonly used belt conveyors can be divided into: common canvas core belt conveyor, steel rope core high-strength belt conveyor, belt conveyor, flame-retardant belt conveyor, double speed double belt conveyor, reversible mobile belt conveyor, cold resistant belt conveyor, etc

Belt conveyor is mainly composed of frame, conveyor belt, belt roller, tensioning device, transmission device, etc

2
skill parameters:
tape width
(mm) conveying length (m)
Power (kw) transmission speed
(m/s) conveying capacity
(t/h)
500≤ twelve
320-30
4-5
520-30
5
5-7
51
3-1
678-191
650≤ twelve
412-20
5
520-30
7
5-111
3-1
6131-323
800≤ six
46-15
5
515-30
7
5-151
3-1
6278-546
1000≤ ten
5
510-20
7
5-1120-40
11-121
3-2
0435-853
1200≤ ten
7
510-20
1120-40
15-301
3-2
0655-1284
1、 Belt deviation is the most common fault when the belt conveyor is running

In order to solve this kind of fault, attention should be paid to the dimensional accuracy of installation and daily maintenance
There are many reasons for deviation, which should be handled differently according to different reasons

1
When the belt of the belt conveyor carrying the idler group deviates in the middle of the whole belt conveyor, the position of the idler group can be adjusted to adjust the deviation; During manufacturing, the mounting holes on both sides of the idler group are machined with long holes for adjustment
The specific adjustment method (see Figure 1) is: which side the belt is biased to, which side of the idler group moves forward towards the belt forward direction, or the other side moves backward
As shown in Figure 1, if the belt deviates upward, the lower position of the idler group should move to the left and the upper position of the idler group should move to the right

2
installation of self-aligning idler group self-aligning idler group has many types, such as intermediate rotating shaft type, four-bar type, vertical roller type, etc
its principle is to use blocking or idler rotation in the horizontal plane to block or generate lateral thrust to make the belt automatically centripetal to achieve the purpose of adjusting belt deviation
Generally, it is reasonable to adopt this method when the total length of the belt conveyor is short or the belt conveyor operates in two directions
The reason is that the shorter belt conveyor is easier to deviate and not easy to adjust
However, this method is generally not used for long belt conveyor, because the use of self-aligning idler group will have a certain impact on the service life of the belt

3
adjust the position of driving drum and reversing drum
The adjustment of driving drum and reversing drum is an important part of belt deviation adjustment
Because a belt conveyor has at least 2 to 5 pulleys, the installation position of all pulleys must be perpendicular to the center line of the belt conveyor length direction
If the deviation is too large, it will inevitably lead to deviation
The adjustment method is similar to that of the idler group
For the head drum, if the belt deviates to the right side of the drum, the right bearing seat should move forward
If the belt deviates to the left side of the drum, the left bearing seat should move forward
Correspondingly, the left bearing seat or the right bearing seat can also be moved backward
The adjustment method of the tail drum is just the opposite to that of the head drum
Adjustment method (see Figure 2)
After repeated adjustment, the belt is adjusted to an ideal position
Find the exact installation position before adjusting the drive or reversing drum
4
adjustment of the tensioning position adjustment of the belt tensioning position is a very important link in the deviation adjustment of the belt conveyor
In addition to being perpendicular to the belt length direction, the two reversing rollers at the upper part of the heavy hammer tensioning position shall also be perpendicular to the gravity vertical line, that is, to ensure that the axis centerline is horizontal
When using screw tensioning or hydraulic cylinder tensioning, the two bearing seats of the tensioning drum shall be translated at the same time to ensure that the drum axis is perpendicular to the longitudinal direction of the belt
The specific adjustment method of belt deviation is similar to that at the roller

5
the influence of the blanking position at the transfer point on the belt deviation the blanking position of the material at the transfer point has a great influence on the belt deviation, especially when the projection of the two belt conveyors on the horizontal plane is vertical
Generally, the relative height of the upper and lower belt conveyors at the transfer point shall be considered
The lower the relative height, the greater the horizontal velocity component of the material, and the greater the lateral impact on the lower belt
At the same time, it is difficult for the material to be centered
The material on the belt cross section is deflected, resulting in belt deviation
If the material deviates to the right, the belt deviates to the left, and vice versa
During the design process, the relative height of the two belt conveyors shall be increased as much as possible
The form and size of the upper and lower funnels, guide grooves and other parts of the mobile bulk material conveying machinery subject to space constraints should be carefully considered
Generally, the width of the guide chute should be about two-thirds of the belt width
In order to reduce or avoid belt deviation, a material baffle can be added to block the material and change the falling direction and position of the material

6
The adjustment of two-way running belt conveyor deviation the adjustment of two-way running belt conveyor deviation is much more difficult than that of one-way belt conveyor deviation
In the specific adjustment, one direction should be adjusted first, and then the other direction should be adjusted
During adjustment, carefully observe the relationship between belt movement direction and deviation trend, and adjust one by one
The focus should be on the adjustment of the driving drum and the reversing drum, followed by the adjustment of the idler and the adjustment of the material blanking point
At the same time, it should be noted that the stress on the belt section length direction should be uniform when the belt is vulcanized, and the stress on both sides should be as equal as possible when the guide chain is used for traction

3
installation process
Installation sequence belt conveyor is generally installed in the following sequence: Foundation acceptance - Measurement review - head frame, tail frame - intermediate frame, funnel - drive drum, reversing drum - drive device - upper and lower idlers - belt bonding - guide baffle, unloading device, sweeper, stopper - tension device adjustment - safety protection device - test run

Installation points the most common fault in the operation of belt conveyor is belt deviation, which is mostly caused by the reasons that the installation center line is not straight, the roller axis is not perpendicular to the conveyor center line, the idler axis is not perpendicular to the belt center line, and the belt joint is not straight
To ensure the installation quality, the following points shall be achieved:
(1) The center lines of head frame and tail frame shall coincide with the longitudinal center line of the conveyor with a tolerance of 3mm

(2) The horizontal center line of the drum shall coincide with the longitudinal center line of the conveyor with a tolerance of 2mm; The axis line of the drum shall be perpendicular to the longitudinal center line of the conveyor, with a tolerance of 2/1000; The levelness tolerance of the busbar on the drum is 0
5/1000, which can be adjusted at the support with the backing plate

(3) The horizontal center line of the idler shall coincide with the longitudinal center line of the conveyor with a tolerance of 3mm

(4) The edges on both sides of the adhesive tape joint shall be kept in a straight line
The no-load test run of the conveyor shall be 2H
During the operation, the conveyor belt shall not slip, deviate and operate stably
The moving parts and the machine body shall be free of friction and impact

Calculation method of belt conveyor
The earliest design concept derived from the calculation method of belt conveyor has had a very extensive impact on the machinery industry in modern times
With the further development of science and technology, the calculation method of each sub item of the main resistance parameters in the calculation process has been more accurate
These sub items are derived from the composition of the main resistance of belt conveyor
However, the accurate calculation method is rarely used at present, The main reason is that the calculation process is complex and involves a large number of calculation parameters
For the calculation process of power and tension, three more rapid and accurate methods, point by point calculation method, resistance superposition method and iterative calculation method, have been gradually formed
The specific contents include the following points:
(1) Point by point calculation method: this method determines the tension at the running point of the driving drum according to the sag conditions set by the rubber conveyor belt, and then calculates the tension at the point where the driving drum meets by using the point by point tension calculation method
The tension difference between the two on the rubber wrapping drum is the required driving force
This method was mainly used in the early calculation method and the design manual of belt conveyor, This method is difficult to calculate for multi-point drive system;
(2) Resistance superposition method: firstly, calculate the various resistances of the belt conveyor respectively, and add them together to obtain the total resistance and driving force data of the conveyor, and then calculate the tension of each characteristic point of the belt by using the point-to-point calculation method according to the non slip condition and sag restriction condition of the rubber belt and drum
This method is used in the national standard
The main problem of this method is that it can not accurately calculate the resistance related to the belt tension, Generally, the resistance of bending section is ignored in the calculation;
(3) Iterative calculation method: this method is based on the brief resistance superposition method to preliminarily calculate the total resistance, and then calculate the total resistance according to the point by point tension calculation method
When the current total resistance error of the last two times is within the limited range, the calculation ends
Otherwise, the next iterative calculation will be carried out, and finally the total resistance and the tension at each point will be obtained
Since the calculation results of the main resistance in the traditional calculation method are greatly affected by the tension of the industrial conveyor belt, Therefore, the iterative calculation method must be adopted, which is characterized by high accuracy and tedious process, and is suitable for computer operation

Before installation:
The belt conveyor shall be installed after the transfer tower and silo are completed

matters needing attention:
All belt conveyors shall be installed and adjusted according to geological parameters and drawings

Installation work:
Scribe
Check the civil construction, check the anchor bolts and embedded steel plates
Check the position of each part of the belt conveyor
Install truss according to foundation bolt
Installation and adjustment of equipment (including upper and lower idlers, wipers, drives, etc
)
Installing the belt elevator
Installing the telescopic head
Installation of guide chute
Installing tensioning device
Install all electrical part supports
Tape cutting and vulcanization connection
Work before installation
Check:
Check whether the belt conveyor is consistent with the drawing and geological drawing parameters before belt installation
　
Electrical part:
Installation of cable duct
Installation of limit switch, protection device, electric control cabinet, etc
Installation of lighting
Laying cables
Connecting wires
Painting:
Clean the damaged part of the paint and spray paint according to the requirements of the technical specifications

Lubricating oil:
Add grease or lubricating oil to the following equipment according to the procedures specified in the lubricating oil operation manual: reducer, coupling, crane, bearing pedestal, motor bearing, etc

4
product commissioning
Steps for commissioning belt conveyor:
(1) After the installation of each equipment, carefully debug the belt conveyor to meet the drawing requirements

(2) Fill each reducer and moving parts with corresponding lubricating oil

(3) After the installation of belt conveyor meets the requirements, each single equipment shall be tested manually, and the belt conveyor shall be debugged together to meet the action requirements

(4) Debug the electrical part of the belt conveyor
Including the commissioning of conventional electrical wiring and action, so that the equipment has good performance and achieves the designed function