2013年11月1日星期五

Vibrating conveyors and conveyor comparison

Vibrating conveyor SCG temperature model is the main representative of the level of vibrating conveyor , screw conveyor as widely and are therefore classified more than vibrating conveyor , a trough and a tube of the points, equipment type on the horizontal / tilt / vertical screw conveyor machine, shaftless screw conveyor and biaxial screw conveyor .
Vibrating conveyor and Flexible skatewheel conveyor conveyor screw conveyor can be angled , but the angle of the screw conveyor can be larger .
Vibrating conveyor are similar to the properties of vibrating screening apparatus , may be provided multi- transport layer or add a degree of screening mesh conveyor , the

conveyor is a pure Extendable conveyor material transport .
Vibrating conveyor length is limited , usually not more than ten meters , while the tube and trough screw conveyor has two forms , either tubular or trough screw conveyor screw

conveyor can be transported over long distances .
Vibrating conveyor is the use of vibration excitation force generated by the motor drive transmission member so that the material moves forward along a certain direction , while

the conveyor is to rely on momentum generated by ordinary motor drives the screw shaft and blade transportation of materials, their different power source .

2013年10月31日星期四

Belt conveyor speed of friction plate

    High belt conveyor during startup , the use of controllable drive means can reduce the dynamic load ; dynamic load during startup The size starting with the start time and

the acceleration of the growth belt conveyor manufacturer of the law , by analyzing the obtained sinusoidal curve acceleration control ideal start

Dynamic curve .
    In the outlet pressure is constant, the belt conveyor movement speed friction rub the piece the size of the film pressure to a certain extent , the greater the speed , the

greater the centrifugal force , Incline Belt conveyor and the greater the negative pressure , so the film pressure will be reduced . After the porous friction material , the required flow

A flow rate increase.
    When the friction plate is formed with tank when there is conducive to the formation and maintenance of the oil film , and can also reduce wear , effective cooling of the

friction plate; but viscous torque M tank will be somewhat reduced, and as the film thickness thinning , significantly increasing influence tank . With the number of tank

Increases, the friction plate belt conveyor to the transmitted torque can be further reduced.

Screw matching motor selection technique

    Is the use of motor driven screw conveyor spiral rotation, push the material to achieve the transport machinery. It horizontal, check weighers inclined or vertical conveying, transport all

kinds of powder pellets are the ideal equipment . Tubular screw conveyor helical blade material in the transportation of materials, multi-faceted subject to pressure ,

When you need to choose when selecting heat exchange manufacturers the motor power slightly larger, in order to avoid non-normal startup transient excessive power consumption requirements. Trough Screw

Conveyors for its tank for the open type , the material in the upper right helical blade propeller shaft and the pressure ratio is relatively low and thus the electrical Tubular

Screw Conveyors

Machine power requirements slightly lower.

2013年10月30日星期三

Removable belt conveyor roller structure and characteristics

    Removable belt conveyor drum roller to overcome the existing overall structure defects , provide a good disassembly , recyclability and maintainability of the belt conveyor

rollers.
    Removable belt conveyor roller consists Pipe conveyor of three parts , namely leather tube , tube rings and hub components. Drum circle drum skin and is mainly used to connect the hub for

the entire structure Huang pick rollers , drum circles directly connected to the drum skin huang inside , and for the structure of cast blasting drum , drum circle then with

Part of the casting drum skin together. Periphery of the hub plate with a blessing , for the cylinder associated ring . Drum circle and the circumference of the hub plate fu

uniform on a number food conveyor corresponding threaded holes , preclude the use within the six screws and spring washers for connection.
    Removable belt conveyor rollers, use removable design techniques, coupled with the easy removal of the screw to replace the original Hui welding process , making integration

into the overall structure of the drum removable structure , compared with the general structure of the drum with the following characteristics :
    1 , the drum parts to facilitate recycling, reuse ;
    2 , to facilitate recycling of materials ;
    3 , the drum easy maintenance and repair ;
    4, to achieve universal roller .
    The detachable belt conveyor drum , cylinder and the overall manufacturing process of the same drum ; across the outside of the hub independently of the cylinder , the

manufacture can be processed separately , and then the screw thread coupling and cylinder assembly . To ensure the belt conveyor drum performance , drum circle tube

To the inner peripheral surface of the outer surface of the drum as a reference for processing , and then use the inner surface of the drum cylinder ring and the hub to locate

the outer surface with the wheel to ensure that both hubs belt conveyor drum bore concentricity.

Screw the daily operation and maintenance

    Screw conveyor is used to seal conveying powder, granular, small block materials, general purpose conveyor , screw conveyor is widely used for different purposes in

different sectors as may be working Telescopic conveyor in a relatively harsh environment areas, such as the kinds of bearings are in the dust

Work, working conditions in such reasonable operation and maintenance of the screw conveyor on greater significance , the main requirements are as follows :
    1 , in the use of the normal operating procedures to operate, and often observe the screw conveyor is abnormal condition exists. If there is an abnormality please shut down

for inspection, screw conveyor troubleshooting before operation.
    2, please pay attention to safety , do not place your hands or other objects into the rotating parts .
    3 , during use , screw conveyor is strictly prohibited heavy start , start feeding should be preceded by the host , and then feeding ; should be checked before the start of

the cylinder body I is too much material .
    4 , in order to ensure that the requirements of the screw conveyor without load starting , conveyors feeding should be stopped before stopping , and other material inside

the chassis rear was completely lost all stopped .
    5 , in strict accordance with the mixer loading capacity : no more than the effective volume of the mixer used under strict overload use , it would burn or damage the gear

motor and other components . After adding the material must remember not to stop halfway , try to avoid overloading the next start-up.
    6 , the initial feed screw conveyor , the feed rate should be increased gradually until it reaches the conveying capacity , feeding should be uniform, or likely to cause

transport of materials product plugs, drive overload .
    7 , the material being transported shall not be mixed with chunks of hard materials to avoid causing death card spiral screw machine damage.
    8 , the normal operation of 1800 hours conveyor should be a small repair , mainly to check lubrication or replacement of wearing parts ;
    9 , the normal operation of 4000 hours or so should be overhauled , mainly for all assemblies demolition inspection and cleaning, replacement or correction of all wearing

parts and standard parts . When removing the screw conveyor please remember the clear sequence for assembly in the reverse order can be combined . Host computer

Helix and direction of rotation of the feed screw should follow the direction signs, strict reverse direction !

2013年10月29日星期二

New railway construction integration role and soil mixing conveyor belt use

Living house dust and noise away from the spirit of the principle of mixing station located at the rear . After the completion of the layout of the site hardening mixing station

, laying the concrete layer and gravel cushion 10cm thick. Concrete mixing station layout three centralized selection of equipment supporting concrete

Soil mixing station mainly concentrated Equipment Name Model Number Capacity and specifications compulsory mixer JS50025m3/h2 batching machine HPW800D50m3/h2 computer controller

SLZK42 loaders ZL30A1 concrete pump truck drag chain conveyor concrete mixer truck Metropolis Metropolis IHI20m3/h1 cards 6m33

Generators 120kW14 mixing plant designed by two sets consisting of mixing floor pavers common arrangement mostly single or dual -column . Namely the so-called single-row

opposite type, the discharge port disposed roller conveyor in the middle, two sides of blender breakdown ; namely the so-called double -row side by side , two juxtaposed mixer

The discharge port are moving in one direction . Advantages of single -type concrete the material quickly , the overall stability, security and good ; drawback is you must

follow the mixer batching machine breakdown on both sides of the mouth feeding , stacking and loading of concentration, loaders must charge back and forth on both sides . Double

-row compact appearance with

Feeder two in a row, side by side on the material , loading concentration, and small footprint . Drawback is controlled by batching machine pitch , resulting in two sets mixing

machine spacing is too large, resulting in the discharge port connected hopper slope too slow , difficult to discharge , recurrent obstruction affecting production. According to

my unit volume of concrete and pipe work

The actual situation of tight , we chose the single -style layout .
Concrete production , transportation and pumping concrete pumping sand pipe production of concrete production is mainly carried out through the concrete mixing , and its

production process is semi-automatic , automatic control computer that batching , mixing manually controlled discharge , specific production process is divided into feed

, Metering , mixing , discharging four stages .
( A ) feed materials from the stockyard by a shovel loaders transported to breakdown on both sides of the mixer batching machine hopper . Hopper as one of the three- hopper

structure , a stone warehouse, two sand compartment.
( 2 ) Measurement of Aggregate measurement through batching machine computer controller automatically , portable weighing vehicles metering , simply enter the preset mixing

ratio can be automatically measured . Measured in pounds , said cement , artificial unpacking ; admixture add custom containers ; water metering using automated quantitative

water

Sheets to control .
( 3 ) mixing cement , gravel , sand by the lifting hopper raised to the mixer fully mixing , and controls water . Mixing using timing control , compulsory mixing . Optimal

mixing time required by field testing to determine , on-site control by not less than 45s .
( 4 ) adequate mixing of the raw material discharge port after falling to a tanker inside . The hopper can be made , the opening size and tanker inlet matches while ensuring a

smooth interior , slope can not be too slow , so as not to affect the flow rate of the concrete .
Concrete transport refers to transport concrete from the concrete mixing station pumping from the tankers to the scene of the process. Tanker loading excluded before the water

inside the drum . In the process of feeding and transport to gyrate , to prevent segregation of concrete . After access to the site , let Drum Forward

12min and then invert the material. After unloading tankers with self- hosed spout and chute concrete residue adhering to avoid affecting the next concrete discharge flow rate.

In the summer the temperature is high ( greater than 25e), pay attention to controlling the lifetime of the concrete in the tank does not exceed 1h. Cool

Summer season can be wrapped canvas tank to minimize the influence of ambient temperature on the slump .
The transport conveying concrete using concrete pumping main tank to send complementary approach. For bridge piers and other structures to pumping with higher strings pouring

cylinder method ; foundation for culverts and other structures in the lower tank Entitlement to chute pouring method . Construction should pay attention to the following parties

Face: ( a ) pumping grading requirements for raw materials is high, as can be required before mixing pump test. Reasonable mix and well-graded aggregate is an important factor

to prevent plugging . ( 2 ) before you start pumping water into the wet hopper and pipe , and then pressed into 1B2 cement mortar to lubricate the tube

Road, the concrete in the pipeline to increase mobility . General mixing two materials ( approximately 1m3) can be. ( 3 ) of the pumping site , the concrete tank due to the drop

height and the slump of the concrete , the concrete flow or poor often accumulate in the pump inlet grid made ​​of steel

Feed into the slow , dedicated two people can carry on a shovel from the tanker to the concrete chute down Pa , the accumulation of concrete paving on the grid to open .
Experience ( 1 ) through the establishment of centralized Qinshen line mixing station , concrete immediate focus was on the concrete mixing quality and the role of the

construction progress . First, the purchase of materials and the main timber unified , stable quality , which will help manage and reduce material waste ; Second , measuring

quasi-

Indeed, mixing speed, high quality concrete , reducing human factors on the quality of the concrete ; Third , equipment centralized management , maintenance and timely ; Fourth,

mixing station factory construction, construction procedures , skilled workers to operate , less prone to accidents. ( 2 ) Concrete concentrated

Mixing various projects currently stand construction has obviously demonstrated its superiority , but into a larger one , the ministry only mixing plant mixing station ,

batching machine, truck and tanker reached 4.4 million yuan investment . In order to save investment , conditions can be self-processing part of the equipment , such as batching

machine , storage

Hopper , purchasing some electronic component assembly can also achieve the same effect. Mixing machine during use , liner, leaves a large amount of wear and tear , replacing

more frequently, and expensive, belt conveyors can be customized to a specific mechanical machining or processing plant , the cost can be reduced about 70%.

Bucket elevators and vibration elevator and other lifting equipment maintenance considerations

As technology continues to introduce and improve production upgrade machinery to reach a very high specification , has been the demand can be satisfied with the present and

future needs of the construction norms, domestic foundation engineering and construction without bucket elevator equipment, system is a mechanical professional conduct essential

equipment. The feed is

Bucket elevator one of the most important 90 degree conveyor job process , feed is not reasonable not only affects the function of bucket elevators , and right after the sequence operations (

promotion and discharge process ) will attack chain reaction.

For grain, oil, feed mill workshop of bucket chain conveyor elevator feed forward feeding method , reverse feed and bi-directional feed , select the feed method which should speed of thought .

1 , when the lifting speed of the belt and the material flow into the base material when the flow rate are compared hours, usually used reverse feed bucket inside scoop on the

part of the base material and then filled directly from the inlet part of the material , which is fill factor conducive to progress.

2, if enhance the speed and flow of material with the base material when the flow rate is relatively large , the material impact on the larger bucket , reverse feed not only

fill factor affecting the progress of , and additionally increase the power consumption, in this case can be a forward feed .

3, if the fill factor is not easy to reach the required value , presenting " value " falters , then the feed can be bi-directional . Needs to clarify the grain, oil, feed mill

workshop of bucket elevator feeding method is very likely by the technical processes, technology planning the resolutions.

Vibration protection hoist capable of extensive analysis we carried out , surely we should also know how to protect the equipment, but does not know in detail the process of

implementation .

The first operation vibration hoist hoist equipment vibration , do not be afraid to waste money, see the end of all the production line without abnormal , boot empty load

operation eight hours , you are not mistaken , is to empty the load operation , that is to what materials does not increase , idling.

Why should we do ? Like just bought a new computer to the same end , we must first look at the boot operation , while not identical vibration hoist is in the empty -load

operation process, our operating personnel to stand next to , to keep the lubricating oil filling equipment increase next view all connected

Contacts are not reliable, load trial operation feed size of various models in strict accordance with the standard requirements , prohibited materials into greater delineation ;

Uniform feeding after another , the water content is not less than 10-15 % ( according to the material is not the same ) , feeding reaches new TB longitudinal vibration hoist

full load suspension ; load trial operation time 8-24 hours. New vibration hoist feed size stringent demands on delimitation , demarcation prohibit more than materials

Into the device , otherwise , it will cause vibration hoist accessories new impeller imbalances and excesses impeller wear , and even the formation of blocking the impeller

channel and the central feeding tube, the new vibration hoist can not work properly, if there is a slot somethin attack, we must first intercept power , and other host

After the job is aborted completely , then remove the card slot of the material , completely not in the device operating time, the device produced artificially disturbed .