COAL WAGON -TIPPLING VIDEO

WAGON TIPPLING OPERATION:

During the tippling of coal wagon the loaded wagon is pushed on to the tippler plat-form, by pushed away any emptied wagon previously occupying it, and is then weighed. There after the rotation commences through drive unit. The plat-form lifts slowly thereby tilting wagon to rest against side support beam. The rotation of plat-form continuous, and before the plat-form was described 90°, the tippler top stop grips the top of wagon and automatically locks to the end frame, thus holding the wagon. When the plat-form has rotated through approximately 150° ie., fully tippled position is reached, the contents of wagon i.e., coal is discharged into hopper. After completing the operation, the tippler rotates in opposite direction and returns to normal initial position to receive new load wagon.

In general the tippling cycle depicts as 

Tippling cycle time and angle:

1)      Weighing gross             --         90 sec.

2)      Tippling                        --        10 sec.

3)      Pause                           --        90  sec.

4)      Return                         --         10 sec.

5)      Weighing Tare              --        90 sec   .

  Total tippling time                         300 sec.
*The angle of tippling is 150 degrees.

COAL HANDLING PLANT EQUIPMENT

SIDE ARM CHARGER

 

It is an equipment used to handle loaded wagons and hauling them on tippler table where in contents of wagon are discharge into tippler hopper.The empty wagon is further pushed and cleared from table by side arm charger through buttons provided on coupler arm.

MOST POLLUTED PLACES IN WORLD

POLLUTION MEANS ?

COAL CRUSHERS (OR) RING GRANULATORS

Operating principle of Hammer Crusher:The hammer crusher' s main part is the rotor (also called hammer head). The electric motor drives the rotor for high speed revolving in the stave cavity..The material goes into the machine body from the material mouth in upside,and is crushed because of the attacking, the impact, the cutting of the high speed movement's hammer. Under the rotor, there is a lamina cribrosa, the smashing material which is smaller than the size of mesh grade can discharge through the lamina cribrosa, the large size products are brought back to the crushed area by the hammers of the hammer crusher for being recrushed until they reached the required size.,then it will be charged from the lamina cribrosa.

CONVEYOR PULLEYS

Conveyor Pulleys:-

    A conveyor pulley is configured to revolve about an axis of rotation and includes a cylindrical shell and first and second bushing portions supported within the shell. First and second shaft portions are in torque-transmitting engagement with the first and second bushing portions, respectively. Such first and second shaft portions are restrained from axial movement with respect to the first and second bushing portions, respectively, and the first and second shaft portions are spaced from one another. For repair, the shaft portions and related bearings are independently removable without removing the entire pulley from the conveyor system.

SALIENT FEATURES:

• Stable running, good quality, free maintenance.
• Each Pulley is designed according to its position in conveyor, considering all tension parameters.
• Pulleys are statically balance.
• All components are standardised and compatible, hence less cost.

DESIGN AND CONSTRUCTION :

• Welded steel pulleys are of drum type, with rim, end disc and hubs designed to give maximum rim overhang, prevents accumulation of material.
• Smooth Pulley surfaces provide maximum belt protection.
• Hubs and end disc are accurately machined to assure concentric.
• Pulleys are available with straight or crowned face.
• Pulleys shafts are made from carbon steel/EN-8 and are designed for torque and bending moment.
• Normally shafts are keyed in hub. However, taper lock blushing for ease of maintenance can be provided. Shafts are welded to pulley hub in case of light duty. RUBBER LAGGING
• Drive pulley lagging is usually provided to increase traction between belt and pulley.
• Snub and bend pulleys rubber lagging resists accumulation of material on pulley surface.               
• 
  Conveyor pulley types:
  
  
  
  

  1. Head Pulley: The pulley at the discharge end of a conveyor belt; may be either an idler or a drive pulley. Usually it has a larger diameter than other pulleys in the system and is often lagged to increase traction and pulley life.

  2. Snub Pulley :Mounted close to the drive pulley on the return side of the belt, the snub pulley's primary job is to increase the angle of wrap around the drive pulley, thereby increasing traction. Its secondary purpose is reducing belt tension, which is important in maximizing conveyor component life. May be lagged for longer wear life.

  3. Take-Up Bend Pulley :The bend pulley is used for changing the direction of the belt running to the gravity take-up. May be lagged for longer wear life.

  4. Take-Up Pulley:: An adjustable idler pulley to accommodate changes in the length of a conveyor belt to maintain proper tension.

  5. Tail Pulley :A pulley at the tail of the belt conveyor opposite the normal discharge end; may be a drive pulley or an idler pulley.

  6. Return Idler: The idler or roller on which the conveyor belt rides after the load which it was carrying has been dumped.

WORST POWER PLANT

IDLERS AND ROLLERS

Troughing or carrying idlers:

Troughed belts carry for greater tonnages than flat belts, for the same width of the belt and belt speed. Troughing idlers are therefore very important components of belt conveyors.

The inclination of the end rolls of three-roll troughing idlers ranges from 20° to 45°.

Return Idlers:

Return idlers are to support the return stand of the belt.

Generally flat.

Impact idlers:

Impact type troughing idlers, having rolls made of resilient material, are used at loading points i.e., Transfer Points where lump size and height of the material handled could seriously damage the belt, if the belt were rigidly supported.

Self aligning idlers:

For a number of reasons, conveyor belts fend to become distorted transversely, on the idlers. Therefore, belt training idlers frequently are used to train or align the belt to a central position. Unlike normal idler sets, the self aligning idlers are fitted with a pivot at the center which will below the same to swivel freely about the central vertical axis. If the belt deviates it will make contact with the small vertically mounted rolls at the end of each inclined idler. This causes the idler set to swivel in the belt running direction to bring back the belt to the centre.