What are the different types of cranes?

Cranes are the workhorses of modern industry, essential for lifting, การเคลื่อนไหว, and positioning heavy loads with precision and efficiency. From manufacturing floors to bustling ports and massive construction sites, different types of cranes are designed for specific tasks and environments. Understanding these variations is key to selecting the right equipment for the job. This guide explores the main types of industrial and logistical cranes, their unique features, and their primary applications.

What are the different types of cranes?

เครนเหนือศีรษะ (สะพานเครน)

Overhead cranes are ubiquitous in factories, คลังสินค้า, and workshops. They consist of a hoist that moves along a horizontal beam (the bridge), which itself moves on elevated runways along the building’s length.

Single Girder Overhead Crane

• Single Girder Overhead Crane: Features a single bridge beam. They are cost-effective, lighter, and require less headroom. เหมาะสำหรับโหลดที่เบากว่า (up to ~20 tons) and applications with lower duty cycles.
  • แอปพลิเคชัน: Machine shops, สายการประกอบ, storage areas.

Double Girder Overhead Crane

• Double Girder Overhead Crane: Utilizes two bridge beams for superior strength and stability. They can handle much heavier loads (มักจะจบลง 20 tons and up to several hundred tons), accommodate auxiliary hoists, and provide better hook height.
  • แอปพลิเคชัน: โรงถลุงเหล็ก, heavy fabrication facilities, โรงไฟฟ้า, paper mills.

เครนขาสูง

Gantry cranes are similar to overhead cranes but are supported by freestanding legs that move on wheels or rails along the ground, eliminating the need for a building’s roof structure. They are highly versatile for both indoor and outdoor use.

โครงสำหรับตั้งสิ่งของแบบยาง (RTG) เครน

• โครงสำหรับตั้งสิ่งของแบบยาง (RTG) เครน: A mobile gantry crane used primarily in container terminals. It runs on rubber tires, making it highly flexible for stacking containers in yard operations.

  • แอปพลิเคชัน: Container yard stacking and handling.

โครงสำหรับตั้งสิ่งของแบบติดราง (RMG) เครน

• โครงสำหรับตั้งสิ่งของแบบติดราง (RMG) เครน: Similar to an RTG but runs on fixed rail tracks. This allows for more precise positioning, higher stacking capabilities, and is better suited for automated operations.

  • แอปพลิเคชัน: High-density, organized container storage yards, often in intermodal terminals.

Port Cranes (มารีน & Container Handling)

These are heavy-duty giants designed specifically for the rapid loading and unloading of ships.

ส่งถึงฝั่ง (STS) เครน

• ส่งถึงฝั่ง (STS) เครน / Container Gantry Crane: These are the iconic, colossal cranes seen at container terminals. They straddle a ship at berth, moving containers directly between the vessel and the quay. They are essential for modern containerized shipping.

  • แอปพลิเคชัน: Loading and unloading container ships at port terminals.

Container Gantry Crane

• Mobile Harbor Crane: A versatile, wheeled or rail-mounted crane that can perform multiple tasks, including handling containers, bulk materials, and general cargo. It offers great flexibility for multi-purpose ports.

  • แอปพลิเคชัน: General cargo ports, bulk terminals, and smaller container facilities.

Portal / เครนขาสูง (in heavy lifting)

Often referred to as “Goliath” cranes, these are heavy-duty, large-capacity gantry cranes used for massive lifts.

• คำอธิบาย: They feature a fixed or movable structure with one or two beams supported by large, rigid legs on rails. They are engineered for extreme loads.
  • แอปพลิเคชัน: การต่อเรือ (lifting ship sections), อุตสาหกรรมหนัก (lifting reactors, กังหัน), large-scale construction projects (bridge segment installation).

คำถามที่พบบ่อย: Types of Cranes

ไตรมาสที่ 1: What is the most common type of crane inside a factory?

ก: The Overhead Bridge Crane is the most common, with single girder cranes for lighter work and double girder cranes for heavy manufacturing.

ไตรมาสที่ 2: What’s the main difference between an RTG and an RMG?

ก: RTGs (โครงสำหรับตั้งสิ่งของแบบยาง) are mobile and flexible, moving freely in a yard. RMGs (โครงสำหรับตั้งสิ่งของแบบติดราง) run on fixed tracks, offering greater precision, stability for higher stacking, and are easier to automate.

ไตรมาสที่ 3: Which crane is specifically designed for unloading container ships?

ก: The Ship-to-Shore (STS) Container Gantry Crane is specifically engineered for this high-speed, high-capacity task.

ไตรมาสที่ 4: What type of crane would be used to build a large ship?

ก: Massive Portal/Gantry Cranes (often called Goliath or shipbuilding gantries) are used to lift and position large prefabricated sections of a ship’s hull and superstructure.

คำถามที่ 5: How do I choose the right type of crane?

ก: ปัจจัยสำคัญได้แก่: Weight and size of loads, required span and lifting height, duty cycle (frequency of use), available space (indoor/outdoor), mobility needs, and budget. Consulting with a crane specialist is always recommended.

บทสรุป

From the precision of a workshop’s overhead crane to the raw power of a port’s STS crane, each type of crane plays a vital role in global industry and infrastructure. Selecting the correct crane—whether it’s a versatile gantry, a specialized container handler, or a heavy-lift portal crane—is fundamental to achieving safety, ประสิทธิภาพ, and productivity in any material handling operation.