The ancient Chinese high-rotating drum cars and water-lifting rollovers were the prototypes of modern bucket elevators and scraper conveyors; in the mid-17th century, overhead ropeways began to be used to transport bulk materials; in the mid-19th century , various modern structure conveyors have appeared one after another.
In 1868, the belt conveyor appeared in the United Kingdom; in 1887, the screw conveyor appeared in the United States; in 1905, the steel belt conveyor appeared in Switzerland; in 1906, in the United Kingdom and Germany Inertial conveyors appeared. Since then, conveyors have been continuously improved due to technological advances in machinery manufacturing, motors, chemical and metallurgical industries, and have gradually evolved from completing transportation within workshops to completing material handling within enterprises, between enterprises and even between cities, becoming a material An indispensable component of mechanization and automation of handling systems. Conveyors are generally classified according to whether they have traction parts
Conveyors with traction parts generally include traction parts, load-bearing components, driving devices, tensioning devices, redirection devices, supports, etc. Traction parts are used to transmit traction force, which can be conveyor belts, traction chains or wire ropes; load-bearing components are used to hold materials, such as hoppers, brackets or spreaders; the driving device provides power to the conveyor, usually consisting of a motor, reducer and Brakes (stops) and other components; tensioning devices generally include screw type and weight type, which can maintain a certain tension and sag of the traction parts to ensure the normal operation of the conveyor; the support parts are used to support the traction parts or The load-bearing components can be rollers, rollers, etc.
The structural characteristics of a conveyor with traction parts are: the materials to be transported are installed in the load-bearing components connected with the traction parts, or directly mounted on the traction parts (such as conveyor belts), and the traction parts are wrapped around The rollers or sprockets are connected end to end to form a closed loop including a loaded branch that transports materials and an unloaded branch that does not transport materials, and the materials are transported by the continuous movement of the traction parts.
There are many types of conveyors, including belt conveyors, plate conveyors, trolley conveyors, escalators, moving walkways, scraper conveyors, buried scraper conveyors, and bucket conveyors. Conveyors, bucket elevators, suspended conveyors and aerial ropeways, etc.
The structural composition of conveyors without traction parts is different, and the working components used to transport materials are also different. Their structural features are: utilizing the rotational motion or reciprocating motion of the working components, or utilizing the flow of media in the pipeline to transport materials forward. For example, the working component of a roller conveyor is a series of rollers, which rotate to transport materials; the working component of a screw conveyor is a spiral, which rotates in the trough to push materials along the trough; the work of a vibrating conveyor The component is a trough, which reciprocates to transport materials placed therein.
Belt conveyor
Belt conveyor is the most important modern bulk material transportation equipment. It is widely used in electric power, grain, metallurgy, chemical industry, coal, mining, and ports. , building materials and other fields. Belt conveyors have gradually begun to replace cars and motorcycles in some fields because of their wide range of conveying materials, wide range of conveying capacity, strong adaptability of conveying routes, flexible loading and unloading, strong reliability and low cost. transportation. It has become the main equipment for bulk material transportation and plays an increasingly important role in the social and economic structure. In particular, the electric roller-driven belt conveyor has unparalleled advantages and development potential in the process of bulk material transportation in grain depots. Therefore, we expand our thinking, strive to innovate, and combine our original knowledge and existing data to develop it. Carry out innovation and improvement. In this process, it tests its own innovation ability to make its application scope wider and play a more important role in various fields of the national economy.
Accelerating the innovative development of belt conveyors, especially belt conveyors with electric rollers as driving devices, is of extremely important significance. Because of its compact structure, high transmission efficiency, low noise, long service life, stable operation, good working reliability and sealing, and small space occupation, it can adapt to work in various harsh working environments, including wet, muddy, Lots of dust, etc.
Therefore, belt conveyors (electric roller drives) are widely used in various production fields such as mining, grain, and metallurgy at home and abroad. With the continuous broadening of thinking, the continuous improvement of manufacturing technology, and the continuous improvement of manufacturing materials, belt conveyors will be used in an unprecedented manner. development speed. It ensures the efficient, safe and reliable operation of bulk material transportation and will continue to play a more important role in the field of social and economic development.
DTS, DTL universal fixed belt conveyor
Application scope and characteristics:
Used for centralized transportation lanes underground in coal mines, main inclined shaft lifting, open-pit coal mines and ground system transportation. It can be transported horizontally, tilted and with concave and convex arcs. The upward transportation inclination angle can reach 25°, and the downward transportation inclination angle can reach 18°. Materials can be transported by a single machine or a multi-unit transportation system. The product adopts the "Technical Conditions for Belt Conveyors for Underground Coal Mines" MT820-1999 standard.
Conveying machinery can be divided into:
1. Bulk material conveying machinery (such as: belt conveyor\screw conveyor\bucket elevator\large inclination angle Conveyor, etc.)
(1) The belt conveyor is composed of a driving device, a tensioning device, a middle frame of the conveyor belt, and rollers. The conveyor belt serves as a traction and load-bearing component to continuously transport loose materials or finished products. .
Belt conveyor is a friction-driven machine that transports materials in a continuous manner. By using it, materials can be placed on a certain conveying line to form a material conveying process from the initial feeding point to the final unloading point. It can transport both broken materials and finished items. In addition to pure material transportation, it can also cooperate with the requirements of the technological processes in the production processes of various industrial enterprises to form a rhythmic flow operation transportation line. Therefore, belt conveyors are widely used in various modern industrial enterprises.
Belt conveyors are widely used in underground tunnels of mines, mine surface transportation systems, open-pit mining sites and mineral processing plants. It is used for horizontal transportation or inclined transportation.
Universal belt conveyors are composed of conveyor belts, rollers, rollers, and devices such as driving, braking, tensioning, redirection, loading, unloading, and cleaning.
①Conveyor belt
There are two commonly used types of rubber belts and plastic belts. The rubber belt is suitable for working environment temperatures between -15 and 40°C. The material temperature does not exceed 50°C. The inclination angle for conveying bulk materials upward is 12° to 24°. Patterned rubber belts can be used for conveying at large angles. Plastic belts have the advantages of being resistant to oil, acid, and alkali, but have poor adaptability to climate and are prone to slipping and aging. Bandwidth is the main technical parameter of belt conveyor.
②Idle rollers
They are divided into single rollers (the wrapping angle of the tape to the roller is 210° to 230°), double rollers (the wrapping angle is up to 350°) and multi-rollers (for high power) etc. There are trough rollers, flat rollers, self-aligning rollers and buffer rollers. Trough-shaped rollers (composed of 2 to 5 rollers) support load-bearing branches and are used to transport bulk materials; self-aligning rollers are used to adjust the lateral position of the belt to avoid deviation; buffer rollers are installed at the receiving area to Reduce the impact of materials on the belt.
③Roller
It is divided into driving roller and redirecting roller. The driving roller is the main component for transmitting power.
④Tightening device
Its function is to make the conveyor belt reach the necessary tension to avoid slipping on the driving roller, and to ensure that the deflection of the conveyor belt between the rollers is within the specified range Inside. The first is that it works reliably. Belt conveyors are used in many important production units that require continuous operation, such as coal transportation in power plants, bulk material transportation in steel plants and cement plants, and ship loading and unloading in ports. If downtime occurs on these occasions, the losses will be huge. When necessary, the belt conveyor can work continuously one shift after another.
Belt conveyor has low power consumption. Since there is almost no relative movement between the material and the conveyor belt, not only the running resistance is small (about 1/3-1/5 of the scraper conveyor), but also the wear and breakage of the cargo is small, and the productivity is high. These are beneficial to reducing production costs.
The conveying line of the belt conveyor is highly adaptable and flexible. The length of the line is determined according to needs. It can be as short as a few meters or as long as more than 10km.
It can be installed in small tunnels or set up above areas with chaotic ground traffic and dangerous areas.
According to the requirements of the process flow, the belt conveyor can receive materials from one or more points very flexibly. It can also be discharged to multiple points or several sections. When feeding materials to the conveyor belt at several points at the same time (such as the conveyor under the coal bunker in a coal preparation plant) or feeding materials to the conveyor belt through uniform feeding equipment at any point along the length of the belt conveyor, belt conveying The machine becomes a major conveyor line.
The belt conveyor can take materials from the tunnel under the coal storage yard and mix different materials from each pile when necessary. Material can be discharged simply from the conveyor head or at any point along the length of the conveyor belt using a plow discharger or mobile discharge truck.
(2) Screw conveyor, commonly known as auger, is suitable for horizontal transportation, inclined transportation, vertical transportation, etc. of granular or powdery materials. The conveying distance varies according to different deformities, generally from 2 meters to 70 meters.
Conveying principle: The rotating spiral blades push the materials for screw conveyor transportation. The force that prevents the material from rotating together with the screw conveyor blades is the material's own weight and the frictional resistance of the screw conveyor casing to the material.
Structural features: Spiral blades are welded on the rotating shaft of the screw conveyor. The surface shapes of the blades include solid surface type, belt type surface type, blade surface type and other types according to the different materials being transported. The screw shaft of the screw conveyor has a thrust bearing at the end of the material movement direction to give the screw axial reaction force along with the material. When the machine length is long, an intermediate hanging bearing should be added.
Double screw conveyor is a screw conveyor with two rotating shafts respectively welded with rotating blades. To put it bluntly, it means organically combining two screw conveyors to form a screw conveyor.
The direction of rotation of the screw conveyor's rotating shaft determines the conveying direction of the material, but generally, the rotating blades of screw conveyors are designed according to single transport. When conveying in reverse direction, the service life of the conveyor will be greatly reduced.
(3) Bucket elevator uses a series of hoppers evenly fixed on the endless traction component to vertically lift the continuous conveying machinery of materials.
The bucket elevator has the significant advantages of large conveying capacity, high lifting height, stable and reliable operation, and long service life. Its main performance and parameters comply with JB3926----85 "Vertical Bucket Elevator" (the The standard is equivalent to refer to international standards and foreign advanced standards). The traction ring chain complies with MT36----80 "High-strength ring chain for mining". This elevator is suitable for conveying powdery, granular and small pieces of non-toxic materials. Materials with low grindability and grindability, such as coal, cement, stone, sand, clay, ore, etc., because the traction mechanism of the elevator is an endless chain, it is allowed to transport materials with higher temperatures (the material temperature does not exceed 250 ℃). The general conveying height can reach up to 40 meters.
Working Principle of Bucket Elevator
The bucket elevator has a simple structure and stable operation. It has retrieval loading, mixed or gravity discharge, and the bucket elevator rim adopts The combined sprocket is easy to replace. The rim of the sprocket is specially treated and has a long service life. If the lower part adopts a gravity automatic tensioning device, it can maintain constant tension and avoid slipping or dechaining. At the same time, there is a certain tolerance when the hopper encounters obstruction. The performance can effectively protect moving parts, and the material temperature does not exceed 250 ℃.
2. Logistics transportation machinery (such as: assembly lines, assembly line equipment, conveyor lines, suspended conveyor lines, elevators, pneumatic elevators, rack elevators, scissor elevators, roller conveyors, elevators) .
Conveyor types:
High inclination angle conveyor, corrugated sidewall conveyor, sidewall partition conveyor, mobile conveyor, mobile conveyor, horizontal mobile conveyor, large inclination angle belt Conveyor.
Conveyor is ancillary equipment of color tile machinery and is widely used
Stainless steel mesh belt conveyor
1. The frame of this machine can be made of stainless steel. Made of aluminum profiles. Chain plates can be made of corresponding materials and widths as needed. Please refer to the conveyor product - Flatbed Chain to select the type
2. Choose different forms of flatbed chains to achieve various functions such as plane transportation, plane turning, lifting and lowering, etc.
3. The motor can be installed below or above the rack as needed.
4. Speed ??adjustment can choose frequency conversion speed regulation or stepless speed reduction motor.
5. The conveyor can be equipped with side baffles and control station units installed on both sides to realize the automation function of the conveying process.
6. When inquiring, please provide the detailed name and size of the conveyed material and the material, size, speed, conveying capacity requirements, etc. of the machine
Main technical parameters of belt conveyor Belt width (mm) Conveying length (m)
Power (kw) Conveying speed (m/s) Conveying capacity (t/h) 500 ≤12
3 20-30
4-5.5 20-30
5.5-7.5 1.3-1.6 78-191 650 ≤12
4 12-20
5.5 20-30
7.5-11 1.3-1.6 131-323 800 ≤6
4 6-15
5.5 15- 30
7.5-15 1.3-1.6 278-546 1000 ≤10
5.5 10-20
7.5-11 20-40
11-12 1.3-2.0 435-853 1200 ≤10
7.5 10-20
11 20-40
15-30 1.3-2.0 655- 1284 Before installation:
Begin the installation of the belt conveyor after the transfer tower and silo are completed.
Note:
The installation and adjustment of all belt conveyors shall be carried out in accordance with geological parameters and drawings.
Installation work:
Drawing lines
Check the civil construction, check the condition of anchor bolts and embedded steel plates
Check each belt conveyor Position of components
Install truss according to anchor bolts
Install and adjust equipment (including upper and lower rollers, wipers, driving devices, etc.)
Install tape lifting Machine
Install telescopic head
Install guide trough
Install tensioning device
Install all electrical parts brackets
Tape cutting and vulcanization connection
Work before the end of installation
Inspection:
Before tape installation, check whether the belt conveyor is consistent with the drawings and geological graphics parameters. .
Electrical part:
Install cable ducts
Install limit switches, protection devices, electrical control cabinets, etc.
Install lights
p>Laying cables
Connecting wires
Painting:
Clean the damaged parts of the paint and repaint them in accordance with 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 seat, motor bearing wait.
Installing the conveyor
Before installing the conveyor, it must be installed after the transfer tower and silo are completed. The installation and adjustment of all conveyors should be carried out in accordance with geological parameters and drawings. .
Conveyor installation work steps:
1. Draw lines;
2. Check the civil construction and check the condition of anchor bolts and embedded steel plates;
p>
3. Check the position of each component of the conveyor;
4. Install the truss according to the anchor bolts;
5. Install and adjust equipment (including upper and lower rollers, scrapers Water dispenser, driving device, etc.);
6. Install the belt elevator;
7. Install the telescopic head;
8. Install the guide trough;
9. Install the tensioning device;
10. Install all electrical part brackets;
11. Tape cutting and vulcanization connection.
Installation steps for the electrical part of the conveyor:
1. Install cable ducts;
2. Install limit switches, protection devices, electrical control cabinets, etc.;
3. Install lights;
4. Lay cables;
5. Connect wires.
At the end of the installation of the conveyor, the damaged parts of the paint should be repainted in accordance with the requirements of the technical specifications. Secondly, add grease or lubricating oil to the following conveyor equipment according to the procedures specified in the lubricating oil operation manual: reducer, coupling, crane, bearing seat, motor bearing, etc. In the future, conveyors will develop towards large-scale development, expanding the scope of use, automatic sorting of materials, reducing energy consumption, reducing pollution, etc.
①Continue to develop towards large-scale. Large-scale includes several aspects such as large conveying capacity, large unit length and large conveying inclination. The length of the hydraulic conveying device has reached more than 440 kilometers. The length of a single belt conveyor is nearly 15 kilometers, and several belt conveyors have appeared to connect the two places. Many countries are exploring more complete conveyor structures for continuous transportation of materials over long distances and large volumes.
②Expand the scope of use of conveyors. Develop conveyors that can work under high and low temperatures, in environments with corrosive, radioactive, and flammable substances, and that can transport hot, explosive, agglomerating, and sticky materials.
③ Make the structure of the conveyor meet the requirements of the automated control of the material handling system for a single machine. For example, the trolley conveyor used by the post office to automatically sort parcels should be able to meet the requirements of sorting actions.
④ Reducing energy consumption to save energy has become an important aspect of scientific research in the field of transportation technology. The energy consumed in transporting 1 ton of material for 1 km has been used as one of the important indicators for conveyor selection.
⑤ Reduce the dust, noise and waste gas emitted by various conveyors during operation.
Belt conveyors have the advantages of large transport capacity, simple structure, easy maintenance, and standardized components. They are widely used in mining, metallurgy, coal and other industries to transport loose materials or finished items. According to the conveyor According to process requirements, it can be transported by a single unit, or it can be composed of multiple units or combined with other conveying equipment to form a horizontal or inclined conveying system to meet the needs of different layouts of operating lines. It is suitable for conveying with a density of less than 1.67/ton/cubic meter and is easy to Powdered, granular, small pieces of low-grinding materials and bagged materials are extracted, such as coal, gravel, sand, cement, fertilizer, grain, etc. The temperature of the materials being sent is less than 60℃. The machine length and assembly form can be determined according to user requirements. The transmission can be an electric roller or a driving device with a driving frame.
Commonly used belt conveyors can be divided into: ordinary canvas core belt conveyors, steel rope core high-strength belt conveyors, fully explosion-proof downward transport belt conveyors, flame-retardant belt conveyors, double-speed double Transport belt conveyor, reversible movable belt conveyor, cold-resistant belt conveyor, etc.
Belt conveyor is mainly composed of frame, conveyor belt, belt roller, tensioning device, transmission device, etc.
GX type tubular screw conveyor
GX type tubular working principle: The GX type screw conveyor uses a rotating screw to push the transported materials along a fixed casing. For conveying work, the head and tail bearings are moved outside the shell. The hanging bearings use sliding bearings with dust-proof sealing devices. The bearings generally use powder metallurgy. Felt bearings are used to transport cement. The hanging shaft and the spiral shaft are connected by sliders. Product overview of GX type tubular screw conveyor: GX type screw conveyor, commonly known as auger, is a widely used conveying equipment in the minerals, feed, grain and oil, and construction industries. From the perspective of the displacement direction of the transported materials, screw conveyor It is divided into two types: horizontal screw conveyor and vertical screw conveyor, which are mainly used for horizontal transportation and vertical lifting of various powdery, granular and small pieces of loose materials.
Application scope of GX type tubular screw conveyor: The screw conveyor is the main unit for mechanized transportation in various industrial and agricultural departments. It can reduce labor intensity and improve work efficiency in transportation, and has a wide range of applications. It is suitable for various industries, such as building materials, chemical industry, electric power, metallurgy, coal, grain and other industries. It is suitable for horizontal or inclined conveying of powdery, granular and small block materials, such as coal, ash, slag, cement, grain, etc. The main features of GX type tubular screw conveyor: 1. Large carrying capacity, safe and reliable. 2. Strong adaptability, easy installation and maintenance, and long life. 3. The whole machine is small in size and high in speed, ensuring fast and even transportation. 4. The discharge end is equipped with a cleaning device. The whole machine has low noise, strong adaptability, and flexible placement of the inlet and outlet. 5. Good sealing, the shell is made of seamless steel pipe, and the ends are connected to each other by flanges, which has good rigidity. Various manufacturing methods of GX type tubular screw conveyor: The part manufacturing method code indicates the content. Spiral type S. With solid helical surface spiral, its pitch is equal to 0.8 times the diameter. D. With belt spiral, its pitch is equal to the diameter. Hand push. Type discharge port Rack-type discharge port The left-hand installation looks from the screw head section to the tail section, the pull plate pulls to the left. The right-hand installation looks from the screw head section to the tail section, the pull plate pulls to the right. The drive device installation type is left. When installed from the motor, looking forward, the low-speed shaft of the reducer is on the left side of the motor shaft. When installed on the right, looking forward from the motor, the low-speed shaft of the reducer is on the right side of the motor shaft.