Scraper Chain Selection Principles (1)

The reasonable selection of scraper and chain depends on its structure form, chain pitch, scraper pitch and material of construction. When choosing, people should pay special attention to meet the requirements of production capacity, and make the scraper & chain have the adaptability to material.

1. Selection of Scraper Structure Form
The scraper structure form determines the transportation effect of buried scraper conveyor. It could get a good effect through the reasonable selection of scraper. Otherwise, the improper selection of scraper may cause poor transportation effect, even failure.

On the condition of meeting the adaptability to material, the selection principle is to choose the scraper simple in structure. In the specific use, the scraper can be chosen according to the material features (viscosity, suspension property and fluidity), conveyor trough width and conveyor arrangement form. 

1) The material has good transportation property: the scraper in simple shape is preferred, such as T-type, V-type, U-type, etc.
The material has small internal friction coefficient, strong suspension property and high fluidity: complex shape scraper should be used, such as H-type.

2) The material has heavy viscosity, or the viscosity becomes big after the material moisture absorption: in order to reduce the material adhesion on the scraper, and unload and clean material easily, it is better to choose simple structure scraper, such as T-type, V-type, U-type, etc.

3) The material is easy to float chain: the scraper can be inclined position welded.

4) The trough width of buried scraper conveyor is smaller: it is appropriate to use simple shape scraper. When the material with large bulk density is transported in bigger conveyor trough, in order to increase the scraper rigidity, it is recommended to use O-type scraper with diagonal strut. 

5) The buried scraper conveyor is horizontal installation: T-type, U-type or V-type scraper is generally used.
Conveyor vertical installation: V-type and U-type scrapers in outward form arrangement are usually chosen.
Z-type buried scraper conveyor: V-type scraper in inward form arrangement.
Ring-lock (MK type) buried scraper conveyor: V-type scraper in outward form arrangement.
Planar ring structure (MP type) buried scraper conveyor: L-type scraper in outward form arrangement.
Facade ring structure (ML type) buried scraper conveyor: V-type scraper in outward form arrangement. 

scraper chain conveyor

Troubleshooting of Buried Scraper Conveyor

Trouble	Reasons	Troubleshooting
Deviation of chain scraper	1.         The whole equipment installed improperly; casing straightness is too large; wheel axle deflection; head, tail wheel misalignment. 2.         casing transmutation 3.         Tail wheel inclines after adjusting the take-up unit	1.checked the  installation quality 2.Adjusting the casing 3. readjustment
Chain scraper break	1.         Chain wear 2.         The conveyor Overloading operation result in the strength is not enough. 3.         Some hard material fallen into the closed trough and locked the scraper	1.Change chain 2.Eliminate long time overloading operation 3. After manual discharging the machine should feeding uniformly
Chain scraper bent result in break	1.         Casing are not straight 2.         The location of flange is offset then locks the scraper.	1.checked the  installation quality 2.dismantled original installation and install it again
During the operation of chain scraper, it gives out excessive noise	1.         Some hard material fallen into the closed trough 2.         Some chain with looseness or Inflexible faults	1.clear debris 2.change chain
Head wheel not fit in with chain scraper well	1.         Head wheel chain inclines; Casing misalignment 2.         The chain is wearing out after long time operation	1.rectify head wheel shaft 2.change chain

Material conveying equipment of Horizontal scraper chain conveyor

Horizontal scraper chain conveyor is bulk material conveying equipment, which consists of head section with driving device, connect section, tail section, tension device, as well as scraper and chains.By means of moving chains, it  can continuously transport the materials in closed rectangular casing horizontally or at a slight incline.

MS buried scraper conveyor is widely used in cement plant, coal, metallurgy, mining, light, construction, chemical, grain, power industries etc.

Working principle :
When scraper chain conveyor transports horizontally, the pressure which comes from chains in conveying direction to the materials, and the action which comes from the materials themselves cause internal friction. This friction ensures the stable situation between material layers, and it can overcome external frictional resistance which caused by moving materials in the trough and make materials transport as a whole fluid.

Features:

1.Totally enclosed structure, light weight, small volume;
2.Convenient installation and maintenance;
3.Horizontal or slightly inclined transport from 0° to 30°
4.Multiple material feeding point and discharging point;
5.Conveying distance is up to 80m with material temperature lower than 120℃
6.Widely used in cement plant, coal, metallurgy, mining, light, construction, chemical, grain, power industries etc.

Henan Pingyuan Mining Machinery Co., Ltd is the most professional manufacturer of Belt conveyor, and Vibrating screen, Bucket elevator, Screw conveyor, Scraper conveyor using the world's most advanced technology, we are willing to serve every company to meet your custom needs. Our goal is "be the future global leader of mining machinery industry". Have any questions, please contact us without any hesitation.

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Address: 289 Yellow River Road, Xinxiang City, Henan Province, China