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Source: China conveyor network Added by: admin Add time :2007-11-20 15:25:00
summary of
: analysis of the status quo and the development gap between the belt conveyor at home and abroad, especially the core technology of the large belt conveyor (belt conveyor dynamic analysis and monitoring techniques, controllable soft starting power equalization technology), equipment performance and reliability, life, and discusses the development trend of the belt conveyor technology. The
Keywords: belt conveyor; status quo; development trends
Drawing No.: TD528 Document code: A,
1 abroad, the status of the belt conveyor technology
foreign Belt Conveyor machine technology has developed rapidly, mainly in two aspects: one is the functional diversification of the belt conveyor, the magnification range of applications, such as high-angle belt conveyors, tubular belt conveyor, space turn belt conveyor other models; the other hand, the belt conveyor technology and equipment have a huge development, especially long-dista nce, large capacity, high belt speed and other large belt conveyor has become the main direction of development its core technology is developed and applied to the belt conveyor dynamic analysis and control technology to improve the performance and reliability of the belt conveyor. At present, the use of belt conveyors in the coal mine has been shown in Table 1 of the major technical indicators, the key technology and equipment has the following characteristics:
(1) equipment. Its main technical parameters and equipment toward the large-scale development to meet the needs of the high yield and efficiency of intensive production more than the annual output of 300 to 500 million tons.
(2) application of dynamic analysis techniques and mechatronics, computer monitoring and other high-tech, high-power soft-start and automatic tensioning, dynamic monitoring and control on the conveyor, and greatly reduces the dynamic tension of the conveyor belt, the device good operating performance, high transport efficiency.
(3) driver and intermediate driver and the power balance of the multi-conveyor running change to the technology, conveyor stand-alone run-length has been restricted, in theory, and to ensure that the conveyor system equipment versatility, interchangeability and its unit-driven reliability.
(4) new technology of the key components of high reliability. Such as containing CST, etc., including a variety of advanced high-power-driven devices and speeder, high life and high-speed roller, self-cleaning drum equipment, efficient storage with the device, rapid self-moving and tail. FSW production in the United Kingdom FSW1200 / (2 ~ 3) × 400 (600) face along the trough belt conveyor using a liquid adhesive differential or frequency control devices, the transport capacity of 3000 t / h, above the machine tail with the new loader (S500E) supporting the product ion, such as Joy, the Sui Face goes on automatically fast self-moving, less manual work, high production efficiency. The main technical indicators of the
Table 1 belt conveyor abroad
Tab.1 The main technical parameters of belt conveyer in overseas
abroad 300 to 500 million t / a high yield and efficiency mine
main parameters
crossheading telescopic belt conveyor roadway and inclined fixed belt conveyor
Transport distance
Keywords: belt conveyor; status quo; development trends
Drawing No.: TD528 Document code: A,
1 abroad, the status of the belt conveyor technology
foreign Belt Conveyor machine technology has developed rapidly, mainly in two aspects: one is the functional diversification of the belt conveyor, the magnification range of applications, such as high-angle belt conveyors, tubular belt conveyor, space turn belt conveyor other models; the other hand, the belt conveyor technology and equipment have a huge development, especially long-dista nce, large capacity, high belt speed and other large belt conveyor has become the main direction of development its core technology is developed and applied to the belt conveyor dynamic analysis and control technology to improve the performance and reliability of the belt conveyor. At present, the use of belt conveyors in the coal mine has been shown in Table 1 of the major technical indicators, the key technology and equipment has the following characteristics:
(1) equipment. Its main technical parameters and equipment toward the large-scale development to meet the needs of the high yield and efficiency of intensive production more than the annual output of 300 to 500 million tons.
(2) application of dynamic analysis techniques and mechatronics, computer monitoring and other high-tech, high-power soft-start and automatic tensioning, dynamic monitoring and control on the conveyor, and greatly reduces the dynamic tension of the conveyor belt, the device good operating performance, high transport efficiency.
(3) driver and intermediate driver and the power balance of the multi-conveyor running change to the technology, conveyor stand-alone run-length has been restricted, in theory, and to ensure that the conveyor system equipment versatility, interchangeability and its unit-driven reliability.
(4) new technology of the key components of high reliability. Such as containing CST, etc., including a variety of advanced high-power-driven devices and speeder, high life and high-speed roller, self-cleaning drum equipment, efficient storage with the device, rapid self-moving and tail. FSW production in the United Kingdom FSW1200 / (2 ~ 3) × 400 (600) face along the trough belt conveyor using a liquid adhesive differential or frequency control devices, the transport capacity of 3000 t / h, above the machine tail with the new loader (S500E) supporting the product ion, such as Joy, the Sui Face goes on automatically fast self-moving, less manual work, high production efficiency. The main technical indicators of the
Table 1 belt conveyor abroad
Tab.1 The main technical parameters of belt conveyer in overseas
abroad 300 to 500 million t / a high yield and efficiency mine
main parameters
crossheading telescopic belt conveyor roadway and inclined fixed belt conveyor
Transport distance
/ m, 2000 ~ 3000> 3000
belt speed / ms-1 3.5 ~ 4 4 ~ 5, up to 8
throughput / th-1 2500 3000 3000 4000
drive total power / (kW) 1200 ~ 2000 1500 ~ 3000, the largest up to 10100
Belt conveyor technology of
belt speed / ms-1 3.5 ~ 4 4 ~ 5, up to 8
throughput / th-1 2500 3000 3000 4000
drive total power / (kW) 1200 ~ 2000 1500 ~ 3000, the largest up to 10100
Belt conveyor technology of
2 the domestic status quo
China\\ s manufacturing belt conveyor varieties, many types. During the Eighth Five-Year Plan \"period, through the implementation of the project countries through-train\" Nissan million tons of mining equipment, belt conveyor technical level has been greatly improved, coal mine with high-power, long-distance belt conveyor Lu development of key technologies and new products have made great progress. Long distance belt conveyor such as the inclination of complete sets of equipment, high production and high efficiency working face telescopic belt conveyor and so on to fill the domestic blank, and belt conveyor to reduce the key technology and its main components, a theoretical study and product development, successfully developed a variety of soft start and brake, and PLC as the core programmable electronic control device, the drive system with variable speed fluid couplings and planetary gear reducer. At present, China\\ s coal mine belt conveyor Main technical characteristics of indicators shown in Table 2. The main technical indicators of domestic belt conveyor
table
Tab.2 The main technical the parameters of the belt conveyer in China
main parameters crossheading telescopic belt conveyor roadway and inclined fixed belt conveyor
transport distance / m 2000 3000> 3000
belt speed / ms-1 3.5 ~ 4 4 ~ 5, up to 8
throughput / th-1 2500 ~ 3000 3000 ~~ 4000
drive power / (kW) 1200 ~ 2000 1500 ~ 3000, the largest to 10100
, 3 belt conveyor technology at home and abroad the gap
3.1 Large Belt lies at the heart of technical the gap
(1) belt conveyor dynamic analysis and monitoring technology over long distances, the key technology of high-power belt conveyor is a dynamic design and monitoring, which is the core technology to restrict the development of large belt conveyor. China rigidity theory to analyze the study belt conveyor and the development of calculation methods and design specifications, design a high security system (n = 10 or so) on the conveyor belt, with the actual situation is far different. The conveyor belt is in fact a viscoelastic body, long distance belt conveyor belt drive device from the dynamic response of the braking force is a very complex process, rigid body mechanics can not simply be explained and calculations. Belt Conveyor Dynamic design and applicat ion software has been developed for dynamic analysis and dynamic monitoring of the dynamic tension of the conveyor on a large conveyor, reducing the safety belt system, greatly extend the service life to ensure that the conveyor is running reliable so large belt conveyor, designed to reach the highest level (conveyor belt safety factor, n = 5 ~ 6), and conveyor equipment costs, especially in conveyer belt cost is greatly reduced.
(2) reliable and controllable soft-start technology and power balancing technology long distance and large capacity belt conveyor power from the long and multi-motor drive, soft start to reduce the dynamic tension of delivery mechanisms, especially motor drive. In order to reduce the impact on power soft start should be a time-sharing slow start; also control the conveyor starting acceleration 0.1 m/s2 0.3, to solve the carrier tape drive with the belt speed synchronization and conveyor surge phenom enon, reduce the impact of the component parts. The error due to manufacturing errors and motor characteristics, the power of the driving point is not balanced, once a motor power is too large will cause burning motor accident, therefore, the balance of power between the motor should be controlled, and to improve the accuracy of balance. The country has a large number of application of variable speed fluid coupling to to conveyors soft start and power balance, and solve the problem of long distance belt conveyor start with the power balance and synchronization. Regulation accuracy and reliability with foreign countries still lags far behind. In addition, long-distance high-power belt conveyor in addition to a coal belt speed, and also need an inspection with the belt speed, variable speed fluid coupling with soft-start and power balance, but also need to develop suitable long-distance stepless hydraulic speed control device. When the stand-alone power> 500 kW, the soft st arter controlled CST to demonstrate its superiority. Controlled soft starter is within the ring gear of the planetary gear reducer with wet friction clutch combination (ie, viscous transmission). Through the proportional valve and control system to achieve a soft start and power balance, regulation accuracy up to 98%. But very expensive in urgent need of localization. Belt conveyor performance and parameters of the gap
China on
3.2 technical performance can not meet the needs of the high yield and efficient mine, in particular, is key to smooth groove telescopic belt conveyor components and their functions, such as self-moving tail, and efficient storage belt and the tensioning device and other foreign countries has a big gap.
(1) Installed power in China face crossheading telescopic belt conveyor installed power of the 4 × 250 kW foreign products up to 4 × 970 kW, the domestic belt conveyor installed power of about 30% of the foreign product s ~ 40% of the installed power of the fixed belt a difference of greater. Transport capacity of the
(2) of belt conveyor maximum volume for 3000 t / h, abroad reached 5500 t / h.
(3) China\\ s belt conveyor of the conveyor belt width 1400 mm, abroad as 1830 mm. The
(4) with a speed limit because of the fiduciary roller speed, China\\ s belt conveyor belt speed of 4 m / s, the foreign 5m / s or more.
(5) working face, the transport length of China\\ s 3,000 m and abroad for the 7300m.
(6) shift the tail with the efficiency face emerging crossheading telescopic belt conveyor tail with the rapid advance of the face and quickly self-moving. The country since the tail shift is mainly dependent on imports, mainly of two kinds: (a) together with the loader to move the production by British LONGWALL company self-shift tail device. (B) Germany\\ s DBT self-shift tail device. The former is only one propulsion cylinders, the latter two promote the fue l tank. LONGWALL company\\ s claim to the tail for domestic bandwidth of 1.2 m on the conveyor, the drawback is that since the amount of shift the deviation of the tail conveyor is too small, correcting the weak, poor rigidity. German production of self-moving tail effect in the domestic than the former, horizontal, 2 vertical direction are of offset fuel tank, and correcting capability. Therefore, the former needs to be perfect, which is required to develop. However, self-moving tail, it is necessary to meet the non-slip the conveyor normal work requirements, but also to meet the rapid self-moving conveyor downtime.
(7) efficient storage-based tight belt tensioning device our enclosed storage with the structure and winch red tensioning the car is easy to derail, the conveyor belt is easy to deviation roller car is not self-moving conveyor belt stretching, required manual goes on, the maintenance of trouble. Foreign structure advanced open storage with devices and hig h-precision, high-torque trip of automatic tensioning equipment, roller car in place with the conveyor belt stretching. The conveyor belt deviation, does not derail the phenomenon. Varieties models of
(8) conveyors, fewer species, single function, the use of limited scope, can not give full play to its performance, such as the expansion of transport, haul or two-way transportation, so that the use of a machine; In addition, China\\ s coal mines geological conditions vary widely, often there will be some special requirements on the layout of the transport system, such as bending, large inclination angle (> +25 °) until the vertical lifting, should develop a special type of special kinds of belt conveyor. 3.3
reliability, life expectancy gap
(1) conveyor belt tensile strength of the fabric of China\\ s production of flame retardant conveyor belt is up to 2500 N / mm abroad for 3150 N / mm. The wire rope core flame-retardant conveyor belt up to 4000 N / mm, and abroad for 7000 N / mm. The conveyor belt joint strength of
(2) China\\ s conveyor belt joint strength of 50% to 65% of the mastering, mastering the 70% to 75% foreign.
(3) care roll life of the existing roller technology with foreign, short life, low speed, resistance, while the United States using the new oiling roller, running resistance, bearing with thin oil lubrication, which greatly improve the service life of the roller, and can be applied as a high-speed roller belt conveyor, using a wide and significant economic benefits. Of conveyor idler life of 20,000 h, the foreign roller life of 5 to 90 000 h only 30% to 40% of the foreign products, domestic roller life.
(4) conveyor speed reducer life in China conveyor reducer life of 20,000 h, the foreign reducer life of 70,000 hours. Belt conveyor running up and down
(5) reliability is poor (1) of the gap
on
3 .4 control system driven approach in China for the variable speed fluid coupling and Hardened reducer, foreign transmission forms, such as BOSS system, CST controllable drive system, high control accuracy.
(2) monitoring devices and foreign conveyor has high-grade programmable logic controller PLC, the development of advanced program soft Bo and integrated power relay control and data believed, processing, storage, transmission, fault diagnosis and query complete automatic monitoring system. China conveyor using only mid-range programmable logic controller to control the start of the conveyor, the process of normal operation, shutdown, etc.. And controllable Kai (system) device used in conjunction to achieve controllable Kai (system) to move with speed synchronization, power balance and other functions, but not near the device, fault diagnosis and queries. Abroad belt conveyor in addition
(3) conveyor protection device installed to prevent the belt running side slipping, tearing overfill clogged sprinkler dust suppression and other protection devices, in recent years has developed a lot of new monitoring devices: drive pulley. change to the temperature monitoring system of rollers and roller group; smoke alarms and automatic fire extinguishing installations; fibers woven conveyor belt vertical tear and joint monitoring system; proof electronic belt scale automatic metering system. These new protection system in China is basically in the blank. China\\ s current skid, the pile of coal, Coal Chute warehouse full of protection, anti-deviation, over-temperature sprinklers, smoke alarm device reliability, sensitivity, life expectancy low. The
coal mine belt development trend
the 4.1 equipment, large-scale, to improve transport capacity
in order to meet the needs of the high yield and efficiency of intensive production, the transmission capacity of the belt conveyor should increase. Long distance, high belt speed, l arge capacity, high power is the inevitable trend of development in the future direction of development of high yield and efficient mine transport technologies. 10a in the future throughput to 3000 to 4000 t / h, speed increased to 4 to 6m / s, the transmission length for scalable belt conveyor to reach 3000m. For the steel cord belt conveyor to be lengthened to more than 5000m, stand-alone drive power requirements of the 1000 ~ 1500 kW conveyor belt tensile strength of 6000 N / mm (steel core) and 2500 N / mm (steel core ). In particular, the coal mine along the slot scalable delivery technology development, with the emergence of efficiency face and coal technology continues to develop, the original telescopic belt conveyor, whether it is the main parameter or operating performance are difficult to adapt to the high yield efficient face the requirements of the mine site more urgent need of the main parameters, the technology is more advanced, more reliable performance and l ong-distance, large capacity, high-power along the slot can be telescopic belt conveyor, in order to improve our belt conveyor technology level, to fill the gaps, close and catch up with international advanced technical level of industrial countries. Contains seven key technologies: (1) belt conveyor dynamic analysis and monitoring techniques; (2) soft-start technology and the power balance; (3) the middle of drive technology; (4) automatic tensioning technology; â'¸ new life of high-speed roller; (6) fast Since the shift of the tail technologies; (7) efficient storage with technology.
4.2 to improve performance and reliability of the component parts
equipment operation rate of the high and low depending on the performance and reliability of the component parts. In addition to further improve and enhance the performance and reliability of existing components, but also continue to research and development of new technologies and components, such as high-performa nce controllable soft start technology, dynamic analysis and monitoring technologies, efficient storage with devices, rapid self- shift of the tail, high-speed roller, so that the performance of the belt conveyor can be further raised.
4.3 expand function, use of a machine of
expand the functionality of transport, haul or two-way transportation, so that the use of a machine, making it the most economical. Development of special-type belt conveyor, such as curved belt conveyor, dip or vertical lift conveyor.
China\\ s manufacturing belt conveyor varieties, many types. During the Eighth Five-Year Plan \"period, through the implementation of the project countries through-train\" Nissan million tons of mining equipment, belt conveyor technical level has been greatly improved, coal mine with high-power, long-distance belt conveyor Lu development of key technologies and new products have made great progress. Long distance belt conveyor such as the inclination of complete sets of equipment, high production and high efficiency working face telescopic belt conveyor and so on to fill the domestic blank, and belt conveyor to reduce the key technology and its main components, a theoretical study and product development, successfully developed a variety of soft start and brake, and PLC as the core programmable electronic control device, the drive system with variable speed fluid couplings and planetary gear reducer. At present, China\\ s coal mine belt conveyor Main technical characteristics of indicators shown in Table 2. The main technical indicators of domestic belt conveyor
table
Tab.2 The main technical the parameters of the belt conveyer in China
main parameters crossheading telescopic belt conveyor roadway and inclined fixed belt conveyor
transport distance / m 2000 3000> 3000
belt speed / ms-1 3.5 ~ 4 4 ~ 5, up to 8
throughput / th-1 2500 ~ 3000 3000 ~~ 4000
drive power / (kW) 1200 ~ 2000 1500 ~ 3000, the largest to 10100
, 3 belt conveyor technology at home and abroad the gap
3.1 Large Belt lies at the heart of technical the gap
(1) belt conveyor dynamic analysis and monitoring technology over long distances, the key technology of high-power belt conveyor is a dynamic design and monitoring, which is the core technology to restrict the development of large belt conveyor. China rigidity theory to analyze the study belt conveyor and the development of calculation methods and design specifications, design a high security system (n = 10 or so) on the conveyor belt, with the actual situation is far different. The conveyor belt is in fact a viscoelastic body, long distance belt conveyor belt drive device from the dynamic response of the braking force is a very complex process, rigid body mechanics can not simply be explained and calculations. Belt Conveyor Dynamic design and applicat ion software has been developed for dynamic analysis and dynamic monitoring of the dynamic tension of the conveyor on a large conveyor, reducing the safety belt system, greatly extend the service life to ensure that the conveyor is running reliable so large belt conveyor, designed to reach the highest level (conveyor belt safety factor, n = 5 ~ 6), and conveyor equipment costs, especially in conveyer belt cost is greatly reduced.
(2) reliable and controllable soft-start technology and power balancing technology long distance and large capacity belt conveyor power from the long and multi-motor drive, soft start to reduce the dynamic tension of delivery mechanisms, especially motor drive. In order to reduce the impact on power soft start should be a time-sharing slow start; also control the conveyor starting acceleration 0.1 m/s2 0.3, to solve the carrier tape drive with the belt speed synchronization and conveyor surge phenom enon, reduce the impact of the component parts. The error due to manufacturing errors and motor characteristics, the power of the driving point is not balanced, once a motor power is too large will cause burning motor accident, therefore, the balance of power between the motor should be controlled, and to improve the accuracy of balance. The country has a large number of application of variable speed fluid coupling to to conveyors soft start and power balance, and solve the problem of long distance belt conveyor start with the power balance and synchronization. Regulation accuracy and reliability with foreign countries still lags far behind. In addition, long-distance high-power belt conveyor in addition to a coal belt speed, and also need an inspection with the belt speed, variable speed fluid coupling with soft-start and power balance, but also need to develop suitable long-distance stepless hydraulic speed control device. When the stand-alone power> 500 kW, the soft st arter controlled CST to demonstrate its superiority. Controlled soft starter is within the ring gear of the planetary gear reducer with wet friction clutch combination (ie, viscous transmission). Through the proportional valve and control system to achieve a soft start and power balance, regulation accuracy up to 98%. But very expensive in urgent need of localization. Belt conveyor performance and parameters of the gap
China on
3.2 technical performance can not meet the needs of the high yield and efficient mine, in particular, is key to smooth groove telescopic belt conveyor components and their functions, such as self-moving tail, and efficient storage belt and the tensioning device and other foreign countries has a big gap.
(1) Installed power in China face crossheading telescopic belt conveyor installed power of the 4 × 250 kW foreign products up to 4 × 970 kW, the domestic belt conveyor installed power of about 30% of the foreign product s ~ 40% of the installed power of the fixed belt a difference of greater. Transport capacity of the
(2) of belt conveyor maximum volume for 3000 t / h, abroad reached 5500 t / h.
(3) China\\ s belt conveyor of the conveyor belt width 1400 mm, abroad as 1830 mm. The
(4) with a speed limit because of the fiduciary roller speed, China\\ s belt conveyor belt speed of 4 m / s, the foreign 5m / s or more.
(5) working face, the transport length of China\\ s 3,000 m and abroad for the 7300m.
(6) shift the tail with the efficiency face emerging crossheading telescopic belt conveyor tail with the rapid advance of the face and quickly self-moving. The country since the tail shift is mainly dependent on imports, mainly of two kinds: (a) together with the loader to move the production by British LONGWALL company self-shift tail device. (B) Germany\\ s DBT self-shift tail device. The former is only one propulsion cylinders, the latter two promote the fue l tank. LONGWALL company\\ s claim to the tail for domestic bandwidth of 1.2 m on the conveyor, the drawback is that since the amount of shift the deviation of the tail conveyor is too small, correcting the weak, poor rigidity. German production of self-moving tail effect in the domestic than the former, horizontal, 2 vertical direction are of offset fuel tank, and correcting capability. Therefore, the former needs to be perfect, which is required to develop. However, self-moving tail, it is necessary to meet the non-slip the conveyor normal work requirements, but also to meet the rapid self-moving conveyor downtime.
(7) efficient storage-based tight belt tensioning device our enclosed storage with the structure and winch red tensioning the car is easy to derail, the conveyor belt is easy to deviation roller car is not self-moving conveyor belt stretching, required manual goes on, the maintenance of trouble. Foreign structure advanced open storage with devices and hig h-precision, high-torque trip of automatic tensioning equipment, roller car in place with the conveyor belt stretching. The conveyor belt deviation, does not derail the phenomenon. Varieties models of
(8) conveyors, fewer species, single function, the use of limited scope, can not give full play to its performance, such as the expansion of transport, haul or two-way transportation, so that the use of a machine; In addition, China\\ s coal mines geological conditions vary widely, often there will be some special requirements on the layout of the transport system, such as bending, large inclination angle (> +25 °) until the vertical lifting, should develop a special type of special kinds of belt conveyor. 3.3
reliability, life expectancy gap
(1) conveyor belt tensile strength of the fabric of China\\ s production of flame retardant conveyor belt is up to 2500 N / mm abroad for 3150 N / mm. The wire rope core flame-retardant conveyor belt up to 4000 N / mm, and abroad for 7000 N / mm. The conveyor belt joint strength of
(2) China\\ s conveyor belt joint strength of 50% to 65% of the mastering, mastering the 70% to 75% foreign.
(3) care roll life of the existing roller technology with foreign, short life, low speed, resistance, while the United States using the new oiling roller, running resistance, bearing with thin oil lubrication, which greatly improve the service life of the roller, and can be applied as a high-speed roller belt conveyor, using a wide and significant economic benefits. Of conveyor idler life of 20,000 h, the foreign roller life of 5 to 90 000 h only 30% to 40% of the foreign products, domestic roller life.
(4) conveyor speed reducer life in China conveyor reducer life of 20,000 h, the foreign reducer life of 70,000 hours. Belt conveyor running up and down
(5) reliability is poor (1) of the gap
on
3 .4 control system driven approach in China for the variable speed fluid coupling and Hardened reducer, foreign transmission forms, such as BOSS system, CST controllable drive system, high control accuracy.
(2) monitoring devices and foreign conveyor has high-grade programmable logic controller PLC, the development of advanced program soft Bo and integrated power relay control and data believed, processing, storage, transmission, fault diagnosis and query complete automatic monitoring system. China conveyor using only mid-range programmable logic controller to control the start of the conveyor, the process of normal operation, shutdown, etc.. And controllable Kai (system) device used in conjunction to achieve controllable Kai (system) to move with speed synchronization, power balance and other functions, but not near the device, fault diagnosis and queries. Abroad belt conveyor in addition
(3) conveyor protection device installed to prevent the belt running side slipping, tearing overfill clogged sprinkler dust suppression and other protection devices, in recent years has developed a lot of new monitoring devices: drive pulley. change to the temperature monitoring system of rollers and roller group; smoke alarms and automatic fire extinguishing installations; fibers woven conveyor belt vertical tear and joint monitoring system; proof electronic belt scale automatic metering system. These new protection system in China is basically in the blank. China\\ s current skid, the pile of coal, Coal Chute warehouse full of protection, anti-deviation, over-temperature sprinklers, smoke alarm device reliability, sensitivity, life expectancy low. The
coal mine belt development trend
the 4.1 equipment, large-scale, to improve transport capacity
in order to meet the needs of the high yield and efficiency of intensive production, the transmission capacity of the belt conveyor should increase. Long distance, high belt speed, l arge capacity, high power is the inevitable trend of development in the future direction of development of high yield and efficient mine transport technologies. 10a in the future throughput to 3000 to 4000 t / h, speed increased to 4 to 6m / s, the transmission length for scalable belt conveyor to reach 3000m. For the steel cord belt conveyor to be lengthened to more than 5000m, stand-alone drive power requirements of the 1000 ~ 1500 kW conveyor belt tensile strength of 6000 N / mm (steel core) and 2500 N / mm (steel core ). In particular, the coal mine along the slot scalable delivery technology development, with the emergence of efficiency face and coal technology continues to develop, the original telescopic belt conveyor, whether it is the main parameter or operating performance are difficult to adapt to the high yield efficient face the requirements of the mine site more urgent need of the main parameters, the technology is more advanced, more reliable performance and l ong-distance, large capacity, high-power along the slot can be telescopic belt conveyor, in order to improve our belt conveyor technology level, to fill the gaps, close and catch up with international advanced technical level of industrial countries. Contains seven key technologies: (1) belt conveyor dynamic analysis and monitoring techniques; (2) soft-start technology and the power balance; (3) the middle of drive technology; (4) automatic tensioning technology; â'¸ new life of high-speed roller; (6) fast Since the shift of the tail technologies; (7) efficient storage with technology.
4.2 to improve performance and reliability of the component parts
equipment operation rate of the high and low depending on the performance and reliability of the component parts. In addition to further improve and enhance the performance and reliability of existing components, but also continue to research and development of new technologies and components, such as high-performa nce controllable soft start technology, dynamic analysis and monitoring technologies, efficient storage with devices, rapid self- shift of the tail, high-speed roller, so that the performance of the belt conveyor can be further raised.
4.3 expand function, use of a machine of
expand the functionality of transport, haul or two-way transportation, so that the use of a machine, making it the most economical. Development of special-type belt conveyor, such as curved belt conveyor, dip or vertical lift conveyor.
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