a slide related to material handling equipment for study purpose

bucket elevator,cranes,hoists

1. Bucket Elevator Working principle Charge/ Load: Here, no extra force is needed to collect the bulk material. Only gravitational force is acting on the material . Construction of bucket elevator: Belt Buckets: The robust thick-walled plastic or steel buckets running between the parallel rubber chains are joined with flexible bucket strips to create a closed, gap-free and resilient conveying system. Feed section: Depending on the application continuous bucket conveyor is equipped with one or more in-feeds. The length of the feed opening is variable to suit the application, although the width is related to the bucket size. At the in-feed, the product is fed into the buckets from the top at a controlled rate. Appropriate equipment can be supplied to provide a controlled rate of feed. The feed opening is sealed to the bucket belt.

2. Bucket Elevator Discharge section: Continuous bucket conveyors have just one discharge section. The length of discharge will be determined by the discharge characteristics of the product. A bucket knocker can assist product discharge from the buckets. Discharge chutes complete the connection to silos, packaging machines or other equipment in the production line. The drive is mounted in the discharge section. A gear motor is either directly connected to the drive shaft or via a transmission chain. On the opposite side of the drive shaft a backstop bearing prevents the bucket belt from running back. Spillage: Continuous bucket conveyors can be supplied in a self-cleaning version: any product spillage in the bottom horizontal section is collected by the return strand of buckets and returned to the process. Alternatively, cleaning drawers, mesh or hinged bottom panels can be supplied.

3. Bucket Elevator Advantages Smooth transportation of goods Less maintenance required Long service life Low driving power Transverse compactness Ability to raise load up to 50m in height Disadvantages Very sensitive to overload Must be loaded at a uniform rate application: Inclination is limited to 60º with horizontal. Convey various powder Granular and lumpy material Chemical and food industry

4. Bucket Elevator Advantages Smooth transportation of goods . Less maintenance required . Long service life . Low driving power . Transverse compactness . Ability to raise load up to 50m in height . Disadvantages Very sensitive to overload Must be loaded at a uniform rate application: Inclination is limited to 60º with horizontal. Convey various powder Granular and lumpy material Chemical and food industry Applications

5. Bucket Elevator Advantages Smooth transportation of goods . Less maintenance required . Long service life . Low driving power . Transverse compactness . Ability to raise load up to 50m in height . Disadvantages Very sensitive to overload Must be loaded at a uniform rate application: Inclination is limited to 60º with horizontal. Convey various powder Granular and lumpy material Chemical and food industry Applications

6. Bucket Elevator Advantages Smooth transportation of goods . Less maintenance required . Long service life . Low driving power . Transverse compactness . Ability to raise load up to 50m in height . Disadvantages Very sensitive to overload Must be loaded at a uniform rate application: Inclination is limited to 60º with horizontal. Convey various powder Granular and lumpy material Chemical and food industry Applications

7. Pneumatic Conveyor Pneumatic conveyors: Pneumatic conveying is the process of conveying granular / powdered materials by floating the materials in a gas, primarily air, and then allowing it to flow to the destination through a closed pipe. Pneumatic conveying system is used for delivery of non-sticky, dry materials via pipelines to various storage or process points which are economically inaccessible by conventional conveyors. The operating principle common to all types of pneumatic conveying is that motion is imparted to the material by a fast moving stream of air. Thus any pneumatic conveyor consists of an air supply equipment (blower or compressor), pipelines, product storages, air lock feeders and dust filters. Can be used for both bulk and unit movement of materials Air pressure is used to convey materials through a system of vertical and horizontal tubes Material is completely enclosed and it is easy to implement turns and vertical moves

8. Pneumatic Conveyor Types of Pneumatic Conveying 1. Dilute-phase conveying is the process of pushing or pulling air-suspended materials from one location to another by maintaining a sufficient airstream velocity. Dilute phase conveying is essentially a continuous process, characterized by high velocity, low pressure and low product to air ratio. 2. Dense-phase conveying relies on a pulse of air to force a slug of material from one location to another. Dense-phase system is essentially a batch process, characterized by low velocity, high pressure and high product to air ratio unlike dilute phase which is a low product to air ratio. 3. Air-activated gravity conveying is a means of moving product along a conveyor on a cushion of air.

9. Pneumatic Conveyor Types of Pneumatic Conveying 1. Dilute-phase conveying is the process of pushing or pulling air-suspended materials from one location to another by maintaining a sufficient airstream velocity. Dilute phase conveying is essentially a continuous process, characterized by high velocity, low pressure and low product to air ratio. 2. Dense-phase conveying relies on a pulse of air to force a slug of material from one location to another. Dense-phase system is essentially a batch process, characterized by low velocity, high pressure and high product to air ratio unlike dilute phase which is a low product to air ratio. 3. Air-activated gravity conveying is a means of moving product along a conveyor on a cushion of air.

10. Bucket Elevator

11. Overhead Traveling Crane/Bridge Crane This is an overhead handling unit resembling a bridge that is mounted on a pair of tracks, traveling lengthwise. Within the bridge is a cable and hoist that can be positioned at any point along the bridge .

12. Hoist A hoist is a lifting device attached to monorails, cranes, or a fixed point. A hoist can be powered manually or by electric or pneumatic motors. Strictly speaking, the hoist is the lifting device itself; however, by general usage, it is frequently named by the type of crane to which it is attached. There are three major types: 1. Chain hoist is a hoist that serves a fixed spot directly beneath the hoist. A hand chain hoist has a capacity lift ranging from 250 pounds to 30 tons, with a standard lift of 7 to 10 feet. An electric chain hoist has a capacity of 500 pounds to 50 tons with a lift of 10 to 35 feet. 2. Monorail hoist is hoist that is free to move along an overhead rail serving any spot under the track. 3. Jib hoist is a hoist that serves any area circumscribed by the jib in a 360° rotation (a boom extending from, and free to pivot around, a fixed vertical post). The height can be adjusted from 4 to 30 feet.

13. Hoist Applications Hoists are primarily intended for transferring moderately heavy objects across a short distance. Hoists are also used to suspend a workpiece while various operations are being performed.

14. Crane Crane Stacker crane is a crane that, instead of hoisting, uses platforms with forks. It is used mainly in storing and retrieving a unit load (palletized materials, boxes, or other containerized loads). Tower crane is used mainly on large construction projects. It consists of a hoist that travels on a horizontal boom attached at one end to a vertical post. The other end of the boom is supported by a guy line to the top of the post. The boom itself can be rotated 360° around its post.

15. Crane Crane Gantry crane is a large traveling crane supported by towers or side frames running on parallel tracks. It is mainly used in heavy outdoor activities such as loading and unloading on shipping docks, shipbuilding, etc. Jib crane is a crane that can travel on a horizontal boom, which may be mounted on a column, or mast. The mast can be fastened to the floor or roof, or the boom can be fastened directly to the wall brackets or rails on the wall. Jib cranes can rotate 360°, are inexpensive and versatile, and are used in loading and unloading individual workstations or material-handling carriers.

16. Cranes

17. Cranes

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