There are significant differences between coal conveyor bridge and cable bridge in terms of usage, structural design, material selection, etc., which are mainly due to the difference in the materials they carry (coal vs cable). The following is a detailed comparison: 

1. Usage and Carrying Materials 

Type Carrying Content Application Scenario 

Coal Transmission Bridge Coal, ore, bulk materials Thermal power plants, coal mines, chemical plants, metallurgical plants, etc. 

Cable Bridges Power cables, control cables, telecommunication cables Buildings, factories, sub-stations, data centres, etc. 

2. Structural Design 

Comparison Items Coal Transmission Bridge Cable Bridges 

Structural Strength Strong load-bearing capacity, need to support a large amount of bulk materials Mainly support the weight of cables, relatively small weight-bearing Sealing Relatively small load-bearing capacity 

Sealing Fully or semi-enclosed design to prevent dust leakage Open, tray or ladder type for heat dissipation and cabling 

Inclination angle Inclination angle may be designed to facilitate material conveyance Usually mounted horizontally or vertically 

Support spacing Smaller support spacing (to prevent sagging and deformation) Larger support spacing (for lighter weight of cables) 

3. Materials and corrosion protection 

Types of commonly used materials for corrosion protection 

Coal transport bridges Thick steel plate (Q235), stainless steel Hot-dip galvanised, epoxy galvanised, epoxy galvanised, epoxy galvanised, epoxy galvanised, epoxy galvanised (Q235), stainless steel Hot-dip galvanised, epoxy coated, wear-resistant lining 

Cable bridges Galvanised steel, aluminium alloy, FRP Electro-galvanised, sprayed, anodised (aluminium alloy) 

Coal conveyor bridges: more emphasis on abrasion and corrosion resistance (coal is abrasive and humidity affects it).

Cable bridges: more emphasis on light weight and electromagnetic shielding (e.g. aluminium alloy bridges are anti-interference).

4. Installation and maintenance 

Comparison items Coal conveyor bridge Cable bridge 

Installation complexity Material flow needs to be taken into account, high installation accuracy Modular design, flexible installation 

Maintenance needs Regular cleaning of coal accumulation and wear checking Usually maintenance free, only cable condition needs to be checked 

5. Typical schematic 

Coal conveyor bridge: 

Closed structure similar to belt conveyor, may be equipped with vibration blocking prevention device at the bottom.

Cable Tray: 

Open tray or ladder frame construction for easy cable laying and heat dissipation.

Summary 

Core Differences Coal Conveyor Cable Bridges 

Design Objectives Efficient conveying of bulk materials, dust leakage prevention Safe cable laying, heat dissipation and maintenance 

Key Features High strength, wear resistance, sealing Lightweight, fire protection, EMC 

Selection Notes Material characteristics (particle size, humidity) Cable type (power, communication, fire rating)