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Development history and current situation of conveyor

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Update time : 2022-07-18 14:12:01
With the rapid development of economy, the rapid production of enterprises is inseparable from the automatic conveying system. In the composition of automatic conveying system, conveyor application is the material handling system mechanization and automation, an indispensable part.
The history of conveyor is very long, if you want to pursue the development of conveyor, the earliest can be traced to ancient China's high drum and water overturned car. These two use principle, and the design principle of modern conveyor is very similar, can be said to be the prototype of the development of modern conveyor.
Development course and present situation of conveyor
In foreign history, Archimedes, the Ancient Greek philosopher, invented a spiral water pump, using the continuous rotation of the screw, the use of liquid spiral pressure from a sealed chamber to another sealed chamber, and finally extrusion pump body. This kind of screw pump is the prototype of screw conveyor today.
In the past 30 years, with the development of industrial technology, social productivity and labor costs, the requirements for work efficiency are constantly improving. Delivery, logistics, factories, warehouses and other places in labor-intensive industries have a new pursuit of staff efficiency.
Naturally, in which the most used conveyor, transport equipment has made great progress. Now, the direction of conveyor development can be roughly divided into the following types:
1, turn conveyor: suitable for all kinds of production plants, small and medium-sized goods logistics, power system adopts frequency control system, stable performance, safe and reliable, simple operation, linear speed is generally in 30 meters per minute.
2, climbing belt conveyor: the use of continuous or intermittent movement of the conveyor belt, conveying items below 500kg, or powder, granular items. Climbing belt conveyor is used in high and low difference, can complete continuous transmission, smooth and roller conveyor, or chain plate conveyor connection.
Development course and present situation of conveyor
3. Narrow belt conveyor: it is mainly composed of two end rollers and a closed conveyor belt, which is driven by the friction between the roller and the conveyor belt. In addition to pure material handling, it can also be matched with various industrial production processes to handle requests, forming a rhythmic streamlined traffic line.
4, telescopic belt conveyor: telescopic belt conveyor is in the ordinary belt conveyor to increase the telescopic mechanism, making the belt machine can be free in the direction of length, telescopic belt machine can be two-way operation conveying materials, reduce the cost of loading and unloading, improve work efficiency.
Now because the global environmental pollution is more serious, domestic energy conservation and emission reduction policies are put forward to ensure the survival and living environment of Our country. Nature of environmental protection requirements for all walks of life, there is a new round of promotion. Therefore, it is predicted that the conveyor industry will develop in the following directions according to the national policy and strategy:
1. Conveyor continues to develop to large scale.
Large scale includes large conveying capacity, large single machine length and large conveying Angle. The length of hydraulic conveyors has reached more than 440 kilometers.
At present, the length of the single belt conveyor has been nearly 15 kilometers, and has appeared by a number of components of the connection between a and B "belt conveyor". Many countries are exploring a more perfect conveyor structure for conveying materials continuously for long distance and large volume.
Development course and present situation of conveyor
2, expand the scope of use of conveyor.
To develop conveyors that can work under high temperature and low temperature conditions, corrosive, radioactive and inflammable materials, and transport hot, explosive, easy to agglutinative and viscous materials.
3, make the structure of the conveyor to meet the requirements of the automatic control of the material handling system for single machine.
For example: the post office used automatic parcel sorting trolley conveyor should be able to meet the requirements of sorting action.
4, reduce the energy consumption of conveyor to save energy, has become an important aspect of scientific research in the field of transportation technology. The energy consumed to transport 1 ton of material for 1 km is taken as one of the important indicators of conveyor selection.
5, reduce the dust, noise and exhaust gas generated by all kinds of conveyor in operation.
Conveyer prospect is immeasurable, the output value of this industry, will reach a new height. Because the conveyor conveying, not only simple goods and equipment, but also to promote the power of social development, is also the footprint of human civilization and future development direction.
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The relation between the diameter of the conveying drum of the belt conveyor and the belt layer of the conveyor belt, the matching of the driving drum, the groove Angle of the reversing drum and the drum should be selected reasonably according to the design regulations of the conveyor.
The feed direction shall be in the running direction of the conveyor belt. In order to reduce the impact of falling materials on the conveyor belt, chute should be used to reduce the falling distance of materials.
The receiving part of the conveyor belt should shorten the spacing between idler wheels and use buffer rolls as leakage materials.
The belt conforms to a soft and moderate baffle to prevent the baffle from being too hard and scratching the belt surface of the conveyor belt.

Selection principles and precautions:
Select the appropriate installation method according to the product type; Non-contact sliding switches should be installed away from strong electromagnetic interference and covered with a metal cover.
The slip alarm value should be set after the actual measurement; The speed parameters of each belt conveyor are usually different, and the actual belt running speed is also affected by the installation method and structure of the conveyor, so each conveyor must be set up one by one. The action alarm value of the sliding switch of the machine.
Some products can automatically avoid low speed when the conveyor starts: the conveyor will power the slide switch at the same time the conveyor starts. After the slide switch is energized, after a period of time, it will begin to detect belt speed normally. Try to display real speed and remote display. A product that transmits speed signals.
By installing two protective devices, steer switch and slide switch, belt conveyors can effectively reduce the possibility of conveyor failure, reduce downtime, and better protect transportation equipment and personnel. The products corresponding to the measuring range should be selected according to the actual moving speed of the belt conveyor being measured; Usually, when the conveyor is in normal operation, the speed of the belt running line is about 2.5-4m /s, and the speed of the drum is about 50-300rpm. At the same time, in addition to comparing the rotation speed of the drum and the speed of the conveyor belt, and comparing the sliding switch type, choose the product that can automatically avoid the low speed when the conveyor belt starts. Because the slip alarm of the coal conveyor belt is actually a low speed alarm, therefore, the slip alarm should be shielded during the start of the conveyor. A delay detection method for belt startup can be used (i.e., the delay is delayed for some time after the start of startup, and the working power of the skid switch is turned on after the belt conveyor reaches the belt. Normal speed), but more cumbersome to implement.
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With the continuous development and progress of our conveyor belt industry, the putting into use of steel wire rope conveyor belt has brought great convenience for the development of coal, port, mining and other industries. The specifications of steel wire rope conveyor belt are different, and the service life is also different. There are many factors affecting the service life of conveyor belt in real life. Today, I will introduce what are the factors that affect the service life of the steel wire rope conveyor belt:
1. In the process of use, temperature and environment will affect the service life of wire rope core conveyor belt
2. The dip Angle of the steel wire rope core conveyor belt depends on the running speed
3. The conveyor belt runs under overload for a long working time
4. Use with unsuitable conveying machinery
5. Incorrect manual operation habits
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Big dip belt conveyor and ordinary conveyor is different point is the use of inclined transport, it is suitable for the quality of 500 ~ 2500kg/m3, lumpiness is about 100 ~ 250mm material, used in metallurgy, chemical industry, coal, electric power and other industries, so big dip belt conveyor selection need to know what factors? Here is a detailed analysis:
Large dip Angle belt conveyor selection requirements
1. Determine the specifications of the conveyor belt and the power of the motor;
2, choose the belt conveyor needs zero, parts;
3. Produce drawings.
Large dip Angle belt conveyor selection basis
1, according to the conveying material and unloading method to determine the transport line of large dip Angle belt conveyor. Such as according to the location of the material point and unloading point, you can determine the horizontal conveyor belt distance, dip Angle and lifting height.
2, according to the terrain of the conveying line and the relationship between the adjacent equipment. Determine whether the conveyor conveyor line is set up curve section, or whether the intermediate need to set transfer point.
3, according to the nature of conveying materials and working environment, can determine the speed, bandwidth.
4, according to the production requirements of the conveyor, can determine the specifications of the conveyor.
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