جرثقیل سقفی دو تیر

Introduction to Double Girder Overhead Cranes

A double girder overhead crane is a robust material handling equipment designed to lift and transport heavy loads in industrial settings. Engineered with two parallel main girders, it delivers superior stability and load-bearing capacity compared to single girder models, making it the go-to choice for heavy-duty applications such as steel mills, کارخانه های تولیدی, انبارها, و سایت های ساختمانی. این که آیا شما نیاز به جابجایی ماشین آلات دارید, مواد خام, or finished products, our double girder overhead cranes combine precision, دوام, and safety to optimize your workflow.

What is a Double Girder Overhead Crane?

A double girder overhead crane is a type of bridge crane consisting of two horizontal main girders supported by end trucks (or end carriages) that run along elevated rails (runways) mounted on building columns or standalone structures. The crane’s lifting mechanism—typically a hoist or trolley—is mounted on a trolley that travels along the length of the main girders, allowing 360° coverage of the workspace below.

Unlike single girder overhead cranes, which rely on a single main beam, double girder designs distribute weight more evenly, enabling them to handle much heavier loads (often up to 500 تن یا بیشتر). This makes them essential for industries requiring frequent heavy lifting, where reliability and safety are non-negotiable.

Key Features of Double Girder Overhead Cranes

Our double girder overhead cranes are built to excel in demanding environments. Here are their standout features:

• 1. ظرفیت بار بالا: Designed to handle heavy loads from 10 tons up to 500 تن, making them ideal for heavy-industry applications.
• 2. ثبات برتر: Two main girders distribute weight evenly, reducing sway and ensuring stable operation even with maximum loads.
• 3. Extended Span Options: Available with spans from 10 متر به 35 متر, adaptable to large workspaces like warehouses or factory floors.
• 4. کنترل دقیق: Equipped with advanced hoisting and trolley mechanisms for smooth, accurate positioning of loads—critical for delicate or high-value materials.
• 5. ساخت و ساز بادوام: Made from high-strength steel with anti-corrosion coatings, ensuring long-term performance in harsh conditions (به عنوان مثال, high temperatures, گرد و غبار, or moisture).
• 6. ایمنی پیشرفته: Integrated safety features include overload protection, دکمه های توقف اضطراری, سوئیچ های محدود, and anti-collision devices to prevent accidents.
• 7. طراحی قابل تنظیم: Can be tailored with optional extras like remote control, frequency inverters for variable speed, or specialized hooks for unique load types (به عنوان مثال, کویل ها, ظروف).

مشخصات فنی

Structure of a Double Girder Overhead Crane

A double girder overhead crane consists of several key components working together to ensure efficient lifting and movement:

1. Main Girders

Main Girders

Two parallel steel beams (girders) that form the bridge structure. They bear the load of the trolley and the lifted material, requiring high strength and rigidity.

2. کامیون های پایانی (End Carriages)

کامیون های پایانی

Mounted at both ends of the main girders, these house the wheels and motors that drive the crane along the runway rails.

3. چرخ دستی

چرخ دستی

A movable unit that travels along the top or bottom of the main girders. It carries the hoist and is powered by its own motor for horizontal movement.

4. بالابر

بالابر

The lifting mechanism, including a crane drum, wire rope/cable, و قلاب. It is responsible for raising and lowering loads, with options for electric or hydraulic operation.

5. سیستم برق

سیستم برق

Includes motors, control panels, switches, and wiring to power and operate the crane, واگن برقی, و بالابر.

6. دستگاه های ایمنی

محدود کننده ارتفاع بلند کردن

Overload limiters, travel limit switches, سیستم های توقف اضطراری, and anti-sway devices to ensure safe operation.

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Q1: What’s the difference between a double girder and single girder overhead crane?

الف: Double girder cranes have two main girders, offering higher load capacity (10+ تن) and stability, making them suitable for heavy-duty use. Single girder cranes have one main girder, سبک تر هستند, and better for lighter loads (تا 10 تن) in smaller workspaces.

Q2: Which industries use double girder overhead cranes?

الف: They are widely used in steel mills, automotive manufacturing, کارخانه های کشتی سازی, سایت های ساخت و ساز, انبارها (for heavy pallet handling), and power plants.

Q3: How often should a double girder overhead crane be maintained?

الف: بازرسی های معمول (daily checks for wear, روانکاری) and professional maintenance (every 6–12 months) are recommended to ensure safety and longevity.

Q4: Can double girder cranes be customized for specific applications?

الف: بله. We offer customizations for load capacity, دهانه, ارتفاع بلند کردن, control systems, and specialized attachments (به عنوان مثال, magnets for metal handling, grabs for bulk materials).

Q5: Are double girder overhead cranes compliant with international safety standards?

الف: Our cranes meet ISO, زن, and OSHA standards, with built-in safety features to ensure compliance with global industrial regulations.

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