ISO 2139:1975

Overview

ISO 2139:1975 is an international standard established by the International Organization for Standardization (ISO) that specifies the basic characteristics of continuous mechanical handling equipment designed for loose bulk materials. This standard focuses on oscillating conveyors and shaking or reciprocating feeders equipped with tubular troughs. It addresses the geometrical and physical specifications essential for ensuring reliable and efficient transport of bulk materials in various industrial processes.

The standard applies specifically to two primary types of tubular troughs used in these handling systems: those with closed ends at both sides and those with only one closed end. By defining essential dimensions, frequencies, and oscillation parameters, ISO 2139:1975 facilitates uniformity and compatibility across equipment designs and applications internationally.

Key Topics

• Scope and Application
  ISO 2139:1975 covers oscillating conveyors and shaking or reciprocating feeders designed to handle loose bulk materials. It is applicable to machines using tubular troughs, either with ends closed on both sides or just one closed end.

• Geometrical Specifications

  • Diameter (d) of tubular troughs is standardized with preferred sizes ranging from 100 mm up to 800 mm, following the R10 series of preferred numbers.
  • Height (h) of inlets and discharges is standardized, depending on diameter ranges (50 mm for smaller diameters and 100 mm for larger).
  • Length (l) of troughs follows preferred numerical series (R5, R10, or R20), allowing for standardization and easier equipment design coordination.

• Physical Specifications

  • Defines oscillation frequencies and distances - oscillation frequencies range between 1 Hz and 10 Hz (60 to 600 oscillations per minute).
  • Oscillation distance values conform to the R20 series of preferred numbers.
  • These parameters are selected based on flow requirements, material characteristics, trough length, and equipment type.

• Equipment Types Covered

  • Oscillating conveyors with tubular troughs.
  • Shaking or reciprocating feeders with tubular troughs.

Applications

ISO 2139:1975 supports a wide range of industrial sectors where continuous handling of loose bulk materials is critical. Typical applications include:

• Mining and Mineral Processing
  Efficient transport of ores and mined materials with minimal spillage and material degradation.

• Agriculture and Food Processing
  Conveying grains, seeds, and bulk food ingredients in hygienic and controlled manners.

• Chemical and Pharmaceutical Industries
  Safe and reliable feeding of powdery or granular raw materials into processing equipment.

• Construction and Cement Production
  Handling raw materials such as sand, gravel, and cement powder.

• Waste Management and Recycling
  Controlled feeding of loose waste materials for processing or sorting.

The standardization of dimensions and movement parameters helps optimize equipment performance, reduce maintenance requirements, and ensure interchangeability between different manufacturers’ products.

Related Standards

ISO 2139:1975 interacts closely with other ISO standards focused on bulk material handling and conveyor technology, including but not limited to:

• ISO 3: Preferred Numbers
  Provides the numerical series (R5, R10, R20) used in the standard for defining geometrical dimensions and oscillation distances.

• ISO Standards on Mechanical Conveyors
  These specify various types of conveyor systems, safety requirements, and design principles relevant for bulk material handling.

• ISO Standards on Material Handling Equipment Design
  Cover broader design aspects and testing protocols to ensure mechanical feeders and conveyors meet performance and safety criteria.

By aligning with these related standards, ISO 2139:1975 contributes to a comprehensive framework for bulk material handling solutions worldwide.

Keywords: ISO 2139, oscillating conveyors, shaking feeders, reciprocating feeders, tubular trough, bulk material handling, continuous mechanical handling equipment, conveyor standard, oscillation frequency, geometrical specifications, bulk transport equipment.