2013年11月20日星期三

Sand the next five years with the development trend of the belt conveyor (Ⅱ)

Conveyor Conveyor reducer reducer life life of 20,000 h, foreign reducer life 70,000 h. ⑸ conveyor running up and down on the control system reliability is poor gap ⑴ 3.4

drive speed of the fluid Conveyor System coupling and hard gear reducer and abroad Transmission

Diversity, such as the BOSS system, CST controllable transmission, and control accuracy. ⑵ monitoring device has been adopted abroad conveyor grade programmable logic

controller PLC, the development of advanced primary and comprehensive program of soft power relay control technology and data admissible, processing, storage, transmission,

Fault diagnosis and automatic monitoring system such as a complete query. Our conveyor using only mid-range Belt conveyor programmable controller to control the conveyor starts, normal

operation, shutdown and other works. Although with controllable Kai (system) support device used in conjunction to achieve controllable Kai (system) moving with speed

Synchronization, power balance and other functions, but it does not automatically close device, there is no fault diagnosis and inquiries. ⑶ abroad conveyor belt in addition to

installing protective devices to prevent belt running, slipping, tearing, too full blockage, automatic sprinkler dust and other protective devices, in recent years has developed

a

Many new monitoring devices: drive pulley, change the drum and idlers temperature monitoring system; smoke alarm and automatic fire extinguishing equipment; fiber woven belt

longitudinal tear and joint monitoring system; proof electronic belt scale automatic metering system. These new protection system of China's basic

In the blank. And our existing skid pile of coal, Coal Chute warehouse full protection, anti-deviation, over-temperature sprinklers, smoke alarm device reliability, sensitivity,

life expectancy is relatively low.
Coal belt conveyor technology trends 4.1 large-scale equipment, improve transport capacity in order to meet the needs of high yield and efficiency of intensive production, belt

conveyor to increase transmission capacity. Long distance, high belt speed, large capacity, high power is the inevitable trend of future development, but also

High-yield and efficient mine transportation technology development direction. 10a in the future within the throughput will be increased to 3000 ~ 4000 t / h, but also speed

increased to 4 ~ 6m / s, the length of the telescopic conveyor belt to reach 3000m. Powerful for steel cord conveyor in order to be extended to 5000m

, The stand-alone drive power required to reach 1000 ~ 1500 kW, belt tensile strength of 6000 N / mm (rope core) and 2500 N / mm (steel cord). Especially coal mine conveyor

trough scalable technology development, along with the emergence of high-yield and coal face of technology is not

Breaking development, the original telescopic belt conveyor, whether it is the main parameter, or operating performance are difficult to adapt to the requirements of high-

yielding and efficient face, the main parameters of the mine site needed a larger, more advanced technology, more reliable performance over long distances, large capacity,

high-power trough retractable belt transmission

Sending machine, in order to improve the level of conveyor technology is designed to fill the gaps, proximity and industrial countries to catch up with international advanced

level of technology. It contains seven key technology areas: ⑴ belt dynamic analysis and monitoring techniques; ⑵ soft start and power balancing technology; ⑶ in

Between the drive technology; ⑷ automatic tensioning technology; ⑸ new high-speed roller life technology; ⑹ quick self-moving tail technology; ⑺ efficient storage tape

technology. Component parts to improve performance and reliability of equipment operation rate depends primarily on the high and low performance and reliability of component

parts.
In addition to further improve and enhance existing metadata component performance and reliability, but also continue to research and development of new technologies and

component parts, such as high performance controlled soft start technology, dynamic analysis and monitoring technology, and efficient storage tape devices, rapid self- Move the

tail, high roller, so that the belt

The performance of the conveyor is further improved. 4.3 expand functionality of a machine of expanding transport people, or two-way haul transport and other functions, so a

machine, so as to maximize economic benefits. Development of special-type belt conveyor, such as bending conveyor, inclined or vertical

Enhance the conveyor. ⑵ reliable controllable soft start technology and power equalization techniques long distance and large capacity belt conveyor as power, long distance and

multi-motor drives, soft start mode must be used to reduce the transmission mechanism of dynamic tension, especially when multi-motor drive . To reduce the power

Net impact of the soft starter should have timeshare slow start; also control the conveyor starting acceleration 0.3 ~ 0.1 m/s2, solve bearing belt and the drive belt and

conveyor belt speed synchronization problems swell phenomenon, reducing dollar the impact member. Due to manufacturing errors and electrical characteristics of the error, the

drive

Fixed point of power will appear uneven, once a motor power is too large will cause burning motor accidents, therefore, the power balance between the motors should be

controlled, and improve balance accuracy. China has a large number of application speed fluid coupling to achieve the soft start conveyor and power level

Balance, to solve the long-distance belt conveyor starter and power balance and synchronization issues. But its regulation accuracy and reliability compared with other countries

there is a certain gap. In addition, long-distance high-power requirements of a coal conveyor belt speed in addition, we also need an inspection belt belt speed, adjusting

Although speed fluid couplings soft-start and power balance, but no need to develop suitable long-distance grade hydraulic speed control device. When a single power> 500 kW, the

controllable CST soft starter to demonstrate its superiority. As is controlled soft starter ring gear planetary gear reducer with wet grinding

Rub clutch combination (ie viscous drive). Through the proportional valve and control system to achieve the soft start and power balance, the adjustment accuracy of up to 98%.

But the price is expensive, need localization.
Technical performance gap with our main performance parameters of the belt conveyor can not meet the needs of high-yield and efficient mine, especially trough belt conveyor

scalable key components and their functions, such as self-moving tail, belt and efficient storage tensioning device has such a big gap with foreign countries.

⑴ installed power of working face telescopic belt conveyor maximum installed power of 4 × 250 kW, foreign products up to 4 × 970 kW, belt conveyor domestic foreign products

installed power of approximately 30% to 40% fixed belt conveyors installed power greater difference. ⑵ transport

Maximum volume output capacity of belt conveyor is 3000 t / h, abroad reached 5500 t / h. ⑶ maximum width of conveyor belt of 1400 mm, maximum abroad 1830 mm. ⑷ with speed

limits as trustee roller speed, our conveyor belt speed of 4m / s, country

Outside of 5m / s or more. ⑸ transport length of working face is 3000 m, foreign to 7300m. ⑹ self-moving tail with high yield emerging face, requiring trough belt conveyor

tail with retractable face rapid advance rapidly since the shift. Domestic self-moving tail main

To rely on imports, mainly two kinds: (a) moving together with the loader self-moving tail unit. (B) self-moving tail unit. The former is only a propulsion cylinder, the latter

has two forward cylinders. Claiming bandwidth of tail for a 1.2 m in the country on the conveyor, the disadvantage is self-moving tail lose

The deviation is too small conveyor belt, correcting weak, poor rigidity. German production of self-moving tail better than the former in domestic use, horizontal, vertical, two

cylinders of offset each direction, correction ability.

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