2013年11月29日星期五

Knowledge of mechanical transport silicone cloth Product Introduction

Silica cloth series
Silicone rubber coated fiberglass cloth is high temperature, corrosion , high strength glass fiber cloth, impregnated with silicone rubber calendar or made ??, is a high

performance , multi-composite 90 degree turn conveyor materials and new products. Has been widely used in aerospace , chemical, oil , large-scale power generation equipment, machinery, metallurgy ,

electrical insulation and construction.
Silicone rubber fiberglass cloth main performance characteristics:
1 for cryogenic temperature between -70 ℃ to 280 ℃. Good insulation properties .
2 . Resistance to ozone , oxygen, light and weathering , excellent weatherability field use , life up to 10 years
3 has a high insulation properties, dielectric constant 3-3.2 , breakdown voltage 20-50KV/MM
4 good chemical resistance : 90 degree conveyor resistance to oil, water [ scrub ]
5 High intensity: both soft and malleable, cut processing
Main purpose :
1 Electrical Insulation : Silicone fabric has a high level of electrical insulation and can withstand high voltage load , can be made of insulating cloth , casing and other

products.
2 Non-metallic compensator : silica cloth can be used for flexible pipe connected devices, which can solve the thermal expansion and contraction of pipe damage , silica cloth

with high temperature resistance , corrosion resistance, aging resistance , good elasticity and flexibility It can be widely used in petroleum , chemical, cement , energy and

other fields.
3 corrosion aspects: Silicone rubber coated fiberglass cloth can be used as pipes, savings and external corrosion layer , excellent corrosion resistance , high strength, is an

ideal anti-corrosion materials .
Four other areas : Silicone rubber coated fiberglass membrane materials can be used as sealing materials, high temperature corrosion resistant conveyor belt, packing materials.
Color: silver , gray, red, black , white, transparent color , orange and so on.
Coating: Single or double-sided coating

Transportation machinery knowledge nylon pulley Product Description

Nylon pulleys as crane accessories already widely used in various lifting equipment , with its unique advantages gradually replace the old metal pulleys.
Use nylon pulleys advantages:
1, light weight, easy installation at Incline Belt conveyor high altitude .
2 , wear resistance and long service life.
3, the protective wire, Flat belt conveyor extend the service life of the rope . ( And steel wire rope pulley ratio to extend the service life of 8 times )
4 , does not produce friction sparks, strong safety performance.
5 , to meet the requirements of long-term outdoor operation.

2013年11月25日星期一

Simple diagnostic methods provide transportation machinery gear vibration

Continuous engagement with teeth can transmit motion and power on the rim of the mechanical components . Gear is capable of engaging each other toothed machine parts , gears in

the transmission of the application appeared very early . Of the 19th century , the principle developed into gear cutting method and use of this principle of special machine

tools and gear cutting tool

Have appeared , along with the heat exchange manufacturers development of production, gears smooth functioning attention .
Simple gear vibration diagnostic methods
Simple diagnostic purpose is to quickly determine the gear is in normal working condition, in an abnormal working condition for further precision gear diagnostic analysis or

take other measures. air to water heat exchanger Of course, in many cases, the basis of a simple analysis of the vibration can also be diagnosed some

Apparent failures .
Simple diagnostic gear including noise diagnostics, vibration and shock pulse level diagnostic method (SPM) diagnostic method most commonly used is the vibration level

diagnostics .
Zhenping diagnostic method is the use of vibration to determine the strength of gear gear is in normal working condition of diagnostic methods . According to the determination

of different indicators and standards , determine the method can be divided into the absolute and relative value judgment method.
1 . The absolute determination method
The absolute determination method is the use of the gearbox parts amplitude values ??measured at the same measuring point directly evaluated as an indicator of operating status

. The absolute determination gear state identification method , must be based on a different gearbox , different requirements to develop appropriate criteria .

Based primarily on the development of the absolute criteria gear as follows: 1 ) A theoretical study of abnormal vibration phenomena ; ( 2 ) According to the analysis done by

the experimental vibration phenomena ; ( 3 ) to evaluate the measured data of the statistics ; ( 4 ) Reference domestic outside the relevant standards .

In fact , there is applied to the absolute value of all the gear determination standard, when the size of gear type, etc. , while its naturally different criteria . When a

parameter determined by the vibration of broadband judgment , the standard value must be changed depending on the frequency . Frequency

At 1kHz or less , according to the speed of vibration to determine ; frequencies above 1kHz , vibration judged by acceleration . The actual standard but also according to

specific circumstances .
2 -phase method of determining a time when
In practical applications , the criteria have not yet worked out the absolute value of the gear , you can take advantage of on-site measurement data for statistical average ,

relative to formulate appropriate criteria , using this standard determination method called relative value judgment . Relative criteria requirements

The same parts in the gear box at different times the amplitude of the measuring point measured by the amplitude compared to the normal state , and when the measured value is

compared with the normal value to a certain extent , a certain state is determined . For example , the relative value of the criteria specified actual value reaches 1.6 to 2

times the normal time to arouse

Note , it means danger , such as reaching 2.56 to 4 times. As used in accordance with the specific grading 1.6 times or 2 times in accordance with the grading depends on the

requirements of the gearbox may be higher rough devices ( e.g., mining machinery ) generally use multiple classification. Actual

In order to achieve the best results , you can also employ the two methods in order to compare contrast , a comprehensive evaluation .

Conveyor encyclopedic knowledge Daquan

Conveyor (Conveyor)
Conveyor is in a certain line of material handling machinery continuous delivery of materials , also known as continuous conveyor. Conveyor can be horizontal, inclined conveyor

- Shanghai Mechanical provides Dongyu
And the vertical conveyor can also automated sorting machine be composed of the space of the transfer line , the transfer line is typically fixed. Conveyor transport capacity , long distance , but also

in the transportation process to complete a number of process operations simultaneously , it is widely used .
Can be a single conveyor can also composed several other transportation equipment or horizontal or inclined conveyor system to meet the different needs of arrangement of the

operating line .
Transportation machinery by hot water heat exchanger works can be divided into: 1: Conveyor 2: Screw 3: bucket elevator
The main parameters of the conveyor
General material handling system according to the requirements , various conditions of material handling location , characteristics related to the production process and the

like to determine the material of the primary parameters . ① transmission capacity : conveying capacity of the conveyor is the amount of material fed per unit time . In

conveying bulk

When the material to the mass or volume of material transported per hour is calculated ; into items when in transport , in order to calculate the number of pieces delivered per

hour . ② Conveyor speed : increase transmission speed can increase transmission capacity . When the conveyor belt for traction to transport large pieces and length ,

transmission speed date

Trend increases. But high-speed operation of the belt conveyor to note vibration, noise and start braking problems. As for pulling pieces of a chain conveyor, conveyor speed is

not too large , in order to prevent an increase in the power load. Simultaneously process operation conveyor transport speed should be produced

Process requirements identified . ③ component size : the size of the conveyor components including conveyor width , slat width , hopper volume , pipe diameter and vessel size.

These components have a direct impact on the size of transmission capacity conveyor. ④ conveyor length and inclination : transmission lines

Direct effect on the length and inclination of the conveyor and the total resistance of the power required .

2013年11月23日星期六

Screw safety rules

Screw conveyor equipment has become an important part of the entire production . Advanced structure, strong adaptability, low resistance , long life, easy maintenance ,

protection devices is a significant feature of the screw conveyor .
Before running the Pharmaceutical metal detector , first make sure the screw conveyor equipment, personnel, goods being transported are in a good state of security ; Second, check all moving

parts normally no foreign body , check all electrical wiring is normal, normal to the belt conveyor put into operation.

Finally, to check the difference between the supply voltage and the rated voltage does not exceed ± 5%.
1 passed an examination automatic checkweigher and operating permit holders who are allowed to operate the equipment. The operator must strictly observe safety shift system .
2 Check before starting the various parts of the connecting bolts are loose. Tighten if loose in a timely manner .
3 Check all lubrication points , to add a good lubricant ( grease ) , reducer oil line should be in the range of tick marks .
4 artificial prices moving motor couplings should rotate easily square with the start condition.
5 Check the slot machines and card cover , should be sealed well to prevent leakage of ash and dust flying.
6 boot sequence :
( 1 ) starting device or other device related subject material .
( 2 ) start the screw conveyor .
( 3) The starting material for equipment and installations
7 must be uniform feed to maintain uniform loading .
8 is strictly prohibited and hard particles of iron , screw conveyor to feed the people , to prevent damage , stuck equipment.
9 operation is forbidden to remove the cover to view the body of material handling situations , to prevent accidents .
10. Maintenance equipment must be shut down state , and instructions listed at the switch , to prevent accidents .
11 running machine head bearings and machine tail bearing temperature rise should not exceed 60 ℃.
12. Nose, tail bearing grease should be added once every 4h , 2-3h hanging bearing lubrication once and cut pay attention to the oil flow.
13 before stopping for the stop ( feeding ) feeding device or equipment , before walking down the empty upon the material , so that no load shut down, no-load power .
14 Keep equipment clean and hygienic.
15. Fill out the relevant records as required .
In the screw conveyor operation, must comply with the provisions of articles designed to be transported in goods , comply with screw conveyor design capability. Secondly, we

must pay attention to all categories of personnel not touch moving parts of the conveyor belt , non-professionals are not free to contact with electrical components, control

buttons

And so on. Finally, screw conveyor can not run the inverter stage circuit, such as determining maintenance needs , it must be carried out in order to run the stop frequency ,

otherwise possible damage to the inverter.
Screw run stop , press the stop button until the system can only cut off the power supply after all the stops.

Tubular conveyor installation debugging knowledge

Tubular belt conveyor is designed to introduce patented technology for a variety of complex terrain conditions for a variety of bulk materials transport density 0-2.5t/m3 ,

using ordinary tubular tape Operating ambient temperature range -25 to +40 ℃; any special requirements , with special specifications transportation

Allowable working environment with temperatures up to +160 ℃. Tubular belt conveyor application basically industrial belt conveyor no restrictions , no material transport can be employed , the typical

material handling are: ore , coal, coke , limestone, gravel , shale and alluvial soil . Some get very tricky materials, such as : steel thick

Shrink , petroleum coke , clay, slag, concrete, metal waste, wet fly ash, tailings , bauxite and dust , etc., can also be a tubular belt conveyor . The product can be widely

used in electricity ,material handling conveyor  building materials , chemicals , mining, metallurgy , port, harbor , coal, grain and other

Industry material handling systems. Because of its unique properties , widely used in foreign countries , the application is still relatively small in our country .
Tubular belt conveyor as a new way of transporting coal , has been widely used in foreign countries , because of its unique approach and superior general characteristics of the

belt in the country are increasingly being used in many power plants. Introduced the tubular belt conveyor installation and commissioning of construction technology and methods

for

Future coal belt conveyor installation and commissioning of accumulated experience .
Debugging tubular belt conveyor
Tubular belt conveyor to be installed, after acceptance , and the need for lubrication of the gear portion fill up empty load debugging. Observe the operation of reducer, motor,

rollers, belts and other equipment to record good reducer, motor , roller heat and vibration conditions . Special

Do not over- section belts to observe the operation , see section can put excessive volumes of tubular belt flat belt , flat belt into the tubular belt , when does not work,

stick to adjust excessive care segment . When the overlap is not part of the six tubular belt idlers are upper PSK , the PSK to be adjusted

Idlers .
After commissioning requirements:
1 , the overlapping portions of the belt rollers are in the upper six PSK .
2 , tubular belt turn the snake does not occur .
3, PSK care stick good contact with the belt .
4 , gear, motor vibration, temperature to meet the requirements.
5 , when to start and stop , tensioning device is working properly, the tape without skidding .
6 , not a scratch tape and do not allow the existence of the phenomenon of friction .
7 , when the coal, the entire roller should be flexible rotation .
8, the bearing operating temperature should be stable , bearing temperature <65 ℃, Rolling temperature <80 ℃.
9 , bearing and rotating parts no abnormal state.
10 , no oil spills, oil phenomenon .
11, the control system is properly flexible running operation .
12 , to contribute up to standard.
13 , interlocks and various accidents buttons work well .
14 , the gap chute between rubber apron and tape appropriate .
15, a hydraulic coupling without fever phenomenon .

2013年11月21日星期四

Convex segments belt conveyor Troubleshooting

First, the convex cross section of the central conveyor belt camber
Convex segments belt conveyor belt section often occurs in the direction of the Central bagging, both central bulge. And to make the belt discount, folded after entering bend

pulley or belt drive roller interval belt conveyor design after the extent of damage will intensify . The main reason is bagging with discount transection of the belt

Surface of the central and lateral force per unit length on the value of the difference is belt conveyor manufacturer too large, the central part of the belt slide bagging or discount. Force per unit

length on the size of the difference value and the radius of curvature of the convex sections , roller groove angle. Groove angle, the smaller the radius of curvature of the

convex sections , the more severe camber and discounts .

When the belt conveyor trough angle of greater than or equal to 40 degrees, even in the straight section of the belt conveyor roller head or tail groove angle transition zone

bagging and discounts can also occur at this time should be reduced groove angle or lengthen the transition interval length the distance the belt groove angle slow transition .

For convex segments skin

Belt conveyors should be possible to increase the radius of curvature of the convex sections and transmission capacity to meet the conditions of reduced roller groove angle .
Second, the convex segments snap flat belt conveyor roller and oblique rolls
Belts snap onto rolls of flat roll and helical roller situation generally occurs between the moving bulk materials transport machinery. Such as ship loaders , stackers and

reclaimers . Such equipment cantilever is bent from the root position of the boom are susceptible to this phenomenon. At this time there is also equivalent to a belt convex

segments ,

Due to the geometry size restrictions , it is difficult to achieve a satisfactory transition radius of curvature of the convex section of the required size , the belt conveyor

is located at the root of the cantilever if only through a set of rollers to form two convex segments occurs when the belt Cards nursery rollers inclined flat roll and roller.

The solution

Here is the original one roller group formed two convex segments to forty-five or more groups .

Conveyor belt temperature Protection Act introduced

Roller and belt conveyor belt friction , its temperature measuring instrument , proximity detection roller mounted devices ( transmitters ) issued over-temperature signal , the

received signal is received by heat exchange manufacturers the three -second delay as part of the implementation of the action , cutting off the motor power supply, automatic conveyor stop switch , played a Thermal protection.
Head and mining conveyor coal level protection . If a conveyor operation or an accident can not be blocked or coal bunker is full , parking lots or other reasons , the head of

the pile of coal , coal- contact position sensor corresponding position DL and coal , coal bit to take immediate action to protect the circuit, so that biography

Conveyor belt stops immediately . Then air to water heat exchanger continue to the coal face , the back end of the heap of coal transported by the station in the rotation after the occurrence of an

appropriate stop until the loader automatically stop running .
Each type of conveyor should be in the right place , multi- belt will easily break . At this time, we should pay attention to maintenance .
Mine belt conveyor belt , if it fails, for example, the motor burned, damaged mechanical transmission parts , belt or chain broke , belt slippage , the belt is installed on the

unexpected magnetic switch passive components can not be turned off or the Secretary is not closed, then the normal speed

Control .

Tips for failure judgment conveyor

1, according to the sound operation of the gear unit determine their work status
Near the conveyor with the ear to listen or a screwdriver reducer touch Kazuya reducer housing , with the ear against the wood stick to listening reducer gears and bearings

running sound , sound reducer automated sorting machine normal operation is relatively balanced , when periodic abnormal sound heard , indicating that the teeth of the gear reducer

Deformation caused by the backlash smaller or interdental mixed metallic foreign body ; when the gearbox bearing abnormal sound heard at frequent irregular , indicating beads

bearing hot water heat exchanger frame damage or damage ; When you feel the vibration reducer often left , indicating that the entire meshing gears poor or loose bolts . Abnormal situation must be

Timely manner.
2, check the operational status of idlers
( A ) in the belt conveyor is running, observe the upper and lower rollers and idlers are flexible buffer
( 2 ) self-aligning roller, vertical roll and rotary parts of the conveyor belt deviation , is it flexible rotation .
( 3 ) The idlers and idler and the middle frame between whether jamming things .
( 4 ) The roller damage, abnormal sound, whether the lack of oil .
( 5 ) whether the lack of roll .
( 6 ) The roller is good contact with the belt .
3 , according to the judgment of belt conveyor load operating current situation
At rated current and rated current conveyor is running, proven conveyor running at rated load , belt conveyor working properly ; when the current exceeds the rating , indicating

overloading belt run ; when the current suddenly rises , much higher than the rated current,

Can be jamming things stuck conveyor belt, because immediately stop checking.

2013年11月20日星期三

Conveyor equipment electrically common sense can not be ignored

For electrical aspects conveyor equipment maintenance , please note the following aspects of the problem .
( 1 ) the required use environment using conveyors electrical equipment.
( 2 ) Always check the tightness of the electrical components .
( 3 ) Check the tightness of the wiring terminal elements , too loose is bad , easy ignition and burn components.
( 4 ) Always check the mine conveyors electrical actuation components ( such as electric motors , relays, etc. ) of fever cases , that if there are unusual circumstances, the case should be

based on timely heat treatment, with the greatest degree of reduction of losses.
( 5 ) Check the electrical wiring insulation condition , so well insulated to ensure the safety of persons and equipment .
( 6 ) Once the ignition , smoke , insulation extensive damage etc., should be immediately shut down, Airport conveyor power off and dealt with accordingly , otherwise it may expand the scope of

failure .
( 7 ) When performing maintenance , conveyor equipment and should be marked or wiring electrical schematic completed in strict accordance with the wiring diagram , not free

random access or short , in order to avoid significant damage to electrical equipment ( such as inverter, etc. ) .
Attention to these details of common sense

Scraper conveyor nose and tail frame repair and overhaul standards

First, conveyor nose, tail , the transition slot , over the bridge should be no open welding , should be closely linked . On both sides of the plate rack vertical degree of

tolerance not more than material handling conveyor 2 mm . Rack mounted gear positioning surface , holes and other documents should meet the technical requirements .
Secondly, the head frame , tail frame and slot connections transitional remember to close . Staggered up and down about the distance should be less than 3 mm .
Again , the pressure chain attached firmly , wear should not exceed 6 mm. Over time , the available welding or thermal spraying methods be repaired.
Next, the overall food conveyor sprocket assembly , blind shaft installed in accordance with the technical documentation requirements. When using the split sprocket structure , semi- cylinder

, half- sprocket combinations gap should meet the design requirements , the general should be in the range of 1 to 3 mm .
Finally, the head shaft , tail shaft rotation flexibility, the phenomenon can not touch a card .

Conveyor installation work steps

Conveyor installation steps:
Crossed and check the civil construction , view embedded steel anchor bolts and conditions and the location of the various components of the conveyor ;
Then install the industrial conveyor bolt truss ;
Installation and adjustment of equipment ( including upper and lower rollers, wipers , drives , etc. ) ;
Were installed sequentially belt hoist , telescopic head , guide trough, tensioning devices and all electrical parts bracket ;
Then tape industrial belt conveyor cutting and curing connections.
Electrical part of the conveyor installation steps :
1 Install cable ducts ;
2 Install limit switches , protective devices , cabinet , etc. ;
3 Install lighting and cabling ;
4 Finally connect the wires .

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

Thus, the former needs to be perfect, the latter shall develop. But for self-moving tail requirement is common, both to meet the normal working hours skid conveyor requirements,

but also to meet the conveyor Food conveyor downtime to achieve rapid self-shift. ⑺ efficient storage belt and tensioner seal of use

Closed storage winch red tight band structure and the main tension easily derailed car, conveyor Yi deviation, telescopic conveyor belt when the car is not self-moving roller,

the need to manually hot water heat exchanger goes overhaul trouble. Adopt foreign advanced structure with open storage devices and high-precision, high-torque, large stroke automatic tensioning design

Equipment, roller conveyor with telescopic trolley can automatically place. Conveyor belt Yi deviation, the phenomenon does not appear derailment. ⑻ conveyor varieties models

fewer species, rubber belt conveyor single function, the use of limited scope and can not give full play to its performance, such as the expansion of transport people, or two-way haul transport and

other functions, so

A multi-purpose machine; addition, China coal mine geological conditions vary widely, the layout of the transport system often some special requirements, such as bending, large

angle (> +25 °) until the vertical lifting, etc., should develop a special type of dedicated machines kind of belt conveyors. 3.3 reliability, life on

The gap between the tensile strength of China's production of conveyor ⑴ whole flame retardant fabric conveyor belt up to 2500 N / mm, foreign to 3150 N / mm. Flame retardant

conveyor belt rope up to 4000 N / mm, foreign to 7000 N / mm. ⑵ joint strength conveyor belt joint strength for the mother country

With 50% to 65%, up to mastering foreign 70% to 75%. ⑶ idler roller life of our existing technology and foreign comparative, short life, low speed, resistance, while the United

States such as the use of new oiling roller, its running resistance, bearings lubricated with thin oil, greatly improve the care roll

Life, and can be used as a high-speed roller conveyor, the use of a wide range of significant economic benefits. Our conveyor idler life 20000 h, life abroad roller 5 to 90,000

h, domestic roller life expectancy was only 30% of foreign products to 40%. ⑷ conveyor reducer life I

State conveyor reducer life 20000 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

coupling and hard gear reducer drive abroad diverse ways, such as the BOSS system, CST can

Control and drives, and control accuracy.
Monitoring devices have been using high-grade foreign conveyor programmable controller PLC, developed 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. Only our mining conveyor

With a mid-range 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 without it

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 lot of new monitoring devices: drive pulley, change the drum and the temperature of roller group

Degree of monitoring systems; 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 Mancang 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, such as curved belt conveyors, inclined or vertical lift and so on.

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.

2013年11月19日星期二

LS screw conveyor structure description

    The general structure of the LS screw conveyor drives, the first section , the standard curve conveyor sections , optional sections , tail sections. Screw conveyor drive is a typical

constant torque load , mainly by motor and reducer . Selection of the motor is calculated according to the actual use to determine its power speed , determine the model ;

reducer through a fixed transmission ratio selection models.
    The first Heat Exchanger section , the standard sections , matching the main part of the section and tail section are almost all contain organic grooves and spiral ( spirochetes are mainly

composed of helical blades and screw axes ) . The difference is : the first section contains a first end of the front axle and bearings , chassis has opened a discharge port :

standard sections and optional sections are substantially the same structure , mainly of different sizes and contain unique suspension bearings ( hanging bearing ) ; the tail

section contains some tail shaft and tail bearings , chassis on the opening inlet ( screw conveyor can be set to multi-point and multi-point feeding the material , you can have

multiple inlet and discharge port ) .

LS300 screw conveyor drive and structural preparation

    LS300 screw conveyor drive unit is the whole of the power source . It drives a ZQ series reducer + Y series motor , YTC two kinds of gear motors .
    Drive by a Y-shaped motor , Airport conveyor series reducer and drive frame components. Preganglionic department head with thrust bearings . Transportation of materials can withstand

axial force generated when . Standards are set to the middle section of a suspension bearing , the end portion with postganglionic roll ( plain ) bearings and the base for

supporting the spiral Metal detector for food coil and the compensation error of the length , starting from the head of the screw conveyor should be installed , in sequence . In general arrangement

should pay attention to the feed inlet should not be set bearing in hanging above the spout should not be located at the base or chassis flange connections . If for open spout

and can not affect the base of the arrangements to follow this principle , the use of units should draw screw machine General Plan .

Prevent large angle conveyor belt deviation method

     Inclined belt conveyor belt used by the baseband traditional wavy , ribs and divisions. Baseband appearance with ordinary conveyor belt, sidewall is wavy . In the

production practice , the traditional large angle belt conveyor has a fatal weakness: belt ribs long and turn the platen , edger serious friction between the baseband ,

resulting in a shorter working hours after gravity conveyor the belt ribs wear rupture occurred and baseband tearing , greatly reducing the corrugated sidewall belt life . In the past the main

measures to prevent the belt deviation is controlled by the vertical roller belt position baseband guarantee to achieve, so turning roller and the belt at least one side wall

contact industrial belt conveyor friction , causing the belt gradually wears rupture.
 In order to prevent large angle belt conveyor belt deviation shall organize its structure in accordance with the following methods :
    1, in the corrugated wall of the belt 2 by the air side of the overall increase of vulcanized belt guide , in turn, processed on the platen a respective guide groove , the

guide groove of the guide belt is fitted to ensure that the belt ribs are not turn in direct contact with the platen .
    2, in the middle of the fuselage with a plurality of small pinch roller guide groove belt deviation limit , abolished the vertical roll , avoiding the sides of the vertical

roll with baseband baseband side squeeze caused tearing, to ensure the integrity of the baseband to improve the life of the belt and the machine .

2013年11月4日星期一

Belt conveyor applications and features

    Belt conveyor is a continuous conveying equipment in the most efficient, most commonly used as a model . As a simple structure, less noise during operation , widely used in

mining , metallurgy, hydropower construction sites , ports and industrial enterprises within the assembly line . In China loading and unloading of bulk cargo ports collection ,

the belt has become Crushing equipment a necessary device in the handling and transportation of coal , bulk grain , ore and other professional pier used a lot of long distance, high production

efficiency, fixed belt conveyor , as well as belt conveyor machine as the main ship loaders , unloaders , reclaimers and stacker machines.
    Comparison with the intermittent operation of the crane , belt conveyor has the following advantages :
    1 ) belt conveyor roller chain conveyor can be kept in the same direction for the transport of materials , loading and unloading without stopping , can be transported at high speed , with high

productivity. And this high productivity is far from intermittent crane can be compared. For this reason , the weight and cost of the device are the same, much less than the

productivity of the crane belt machine productivity .
    2 ) As the feed belt uniform , while its speed and relatively stable , and therefore , in the course of which the power consumption is not changed ; the intermittent

operation of the crane of the wide variations in power consumption . Therefore, the calculation of power and belt conveyor drives in terms of weight and cost less than most of

the intermittent work cranes.
    3 ) For the same reason, the maximum load of the conveyor belt and the difference between average loading cranes generally small and the load difference is very significant.

Screw contrast abroad

    The main properties of the screw conveyor and parameters have not meet the demand for high-yield and efficient mine , especially trough screw conveyor scalable key

components and their functions , such as self-moving tail, efficient storage and belt and tensioning devices abroad has a big gap. Main differences are the following:
    ( 1 ) Installed power : vertical conveyor My working face retractable screw machine maximum installed power of 4X250KW, foreign products up 4X970KW, screw machine -made foreign products

installed power of approximately 30% -40% .
    ( 2 ) transport capacity : the maximum volume of screw conveyor is 3000 t / h, abroad reached 5500 t / h.
    ( 3 ) Maximum Belt Width : My screw machine is 1400mm, the largest foreign to 1830mm.
    ( 4 ) with speed : As trustee roller speed limit , our spiral conveyor belt speed of 4 meters 90 degree turn conveyor per second, is 5 meters or more foreign
    ( 5 ) working face Transport Length : our country is 3000m, foreign to 7300m.
    ( 6 ) self-moving tail: As the face of the emerging high-yield , scalable requested trough screw conveyor tail With the rapid advance of face and fast self-moving . Domestic

self-moving tail mainly rely on imports .
    ( 7 ) Efficient storage belt and tensioning device : the band structure of a closed reservoir mainly tensioning easily derailed car , conveyor Yi deviation, telescopic

conveyor belt when the car is not self-moving roller , need manual goes on, overhaul trouble. Adopt foreign advanced structure with open storage devices and high-precision ,

high-torque , large stroke automatic tensioning device , roller conveyor with telescopic trolley can automatically place. Conveyor belt Yi deviation, the phenomenon does not

appear derailment .
    ( 8 ) Conveyor varieties: varieties of small models , single function , the use of limited scope and can not give full play to its performance, in addition , China's coal

mine geological conditions vary widely, the layout of the transport system often some special requirements, such as bending , large angle until the vertical lifting , etc.,

should be developed machines of special type of screw conveyor .

2013年11月1日星期五

Slow screw conveyor application characteristics

    When the conveyor speed is low , the spiral surface material by the gravitational influence of far greater impact by centrifugal force , thus turning the material

continuously along the spiral Flexible Roller Conveyor facing down , so will produce an axial displacement of the screw conveyor .
    The filling coefficient of screw machine is generally less than 0.5 . Because excessive filling , the material is not slid along the spiral surface , but it was stirred over

the helical screw shaft set , powered roller conveyor and can not get the maximum axial velocity . Since slow screw conveyor material influenced by gravity , obviously it can not be used for vertical

screw conveyor or a larger tilt angle upward transport situation .
     Slow conveyor transport capacity, but in the transportation of the material during rolling is always in a state free of loose , less subject to extrusion, suitable caking ,

large abrasive materials. When using standard screws, not only to maintain a rapid slide down the speed, and on the inclined conveyor has a certain ability to adapt ( generally

less than 20 °inclination )

LS series screw conveyor main structural features

    Screw conveyor equipment in China has a history of decades of application , in this long process , the spiral machine equipment constant technical innovation, improve and

perfect , now screw Extendable conveyor machine equipment can be completed in horizontal, inclined , vertical, mobile conveyor , also developed a shaft helical screw shaft and twin-screw , under

which there are a variety of different specifications, in order to have the most extensive helical axis , drag chain conveyor the main representative of the level of screw conveyor LS series , the

series of spiral machine is mainly used for mining , metallurgy, building materials, construction, chemical , laboratories and other occasions , the main structural advantages :
    ( 1 ) using high quality imported high-strength wear-resistant steel making continuous helical blade , made ​​after forming the blade pitch error less than 5mm and smooth

surface to ensure uniform material handling , stability, thus ensuring the material measurement repeatability.
    ( 2 ) continuous spiral blade when making use of cold work hardening of the surface treatment, hardness and wear resistance than ordinary double blades around the outer edge

of hardness up to HB240.
    ( 3 ) before and after the festival spiral blade is sparse , dense two kinds of pitch , effectively prevent plugging . Commonly known as " eat less , spit fast ." Blades

ensures high precision material handling system to do when the tube is full , users from the screw conveyor inlet suction flat canvas sleeve case will be able to judge the

merits of the screw conveyor .
    ( 4 ) screw machine axis are set within a certain distance with intermediate support hanging bearing an inner shaft rotation, hanging in the middle bearing cast steel or

cast aluminum multi-use , single cantilevered bearing body joint of the front section of the blade interrupt spacing is smaller, material overcurrent section maximized and that

material flow smoothly without hindrance .
    ( 5 ) Screw the inlet port to connect with cement silo is divided into : ball joint flange rigidly connected and hanging tarpaulins soft connection plus two forms . Visual

equipment disassembly frequently decide interface forms.
    ( 6 ) before mounting body specially designed to enable normal operation helical axis force is pulling its tension by former bearings, thrust bearings commitment to prevent

the lifting gear and shaft seat pressure, under pressure to avoid the bolt shaft phenomenon generated sweep chamber .