In the heart of China’s bustling industrial landscape, overhead cranes stand as stalwarts of efficiency and precision, revolutionizing the way heavy loads are lifted, moved, and positioned. These sophisticated machines are the backbone of various industries, from manufacturing and metallurgy to warehouses and power stations. However, the true prowess of an overhead crane lies not just in its overall design, but in the intricate harmony of its components.

This in-depth guide delves into the world of overhead crane components in China, uncovering the intricacies of each part and their critical roles. Readers will gain a comprehensive understanding of the structural integrity, electrical and mechanical components, control systems, and safety features that make these cranes indispensable. From the main girders and end girders to the hoisting mechanisms, trolleys, and control cabinets, every component will be explored in detail.

Whether you are a seasoned engineer, a procurement specialist, or an industry newcomer, this guide will equip you with the knowledge to select

Professional Overhead Crane Manufacturers From China …

DGCRANE: A Comprehensive Guide to Overhead and Gantry Cranes

Company Overview

DGCRANE, also known as Xinxiang Degong Machinery Co., Ltd, is a reputable overhead crane manufacturer based in Changnao Industrial Park, Changyuan County, Henan Province, China. The company has been in operation for over 10 years and is recognized as a major player in the global crane manufacturing industry.

Certifications and Standards

• DGCRANE has obtained ISO 9001:2000, CE, and SGS certifications, ensuring that its design and product quality align with international standards.
• The company adheres to advanced European design and manufacturing technologies combined with the latest domestic standards.

Product Range

Overhead Cranes

• European Type Cranes: Independently developed and designed using advanced European technology. These cranes feature a three-in-one reducer (hard tooth surface reducer, frequency conversion brake motor) and are comparable to similar European products in terms of appearance and performance.
• EOT (Electric Overhead Traveling) Cranes: These cranes travel along a bridge between two parallel runways supported by the structures of the factories themselves. The hoist and trolley are placed on the bridge beam, allowing loads to be moved up and down as well as along the beam.

Gantry Cranes

• Heavy Duty Gantry Cranes: Typically used to load and unload heavy items on docks, in rail yards, or factories. DGCRANE produces various specifications of gantry cranes to meet different industry needs.

Electric Hoists

• Electric hoists are not used alone but are often mounted on single girder overhead cranes, monorail cranes, jib cranes, and single girder gantry cranes as the lifting part.

Customization and Solutions

Custom Crane Design and Manufacturing

• DGCRANE offers customized solutions for crane design, production, packaging, and transport. The company caters to various industries including metallurgy, steel mills, prefabricated board factories, and paper mills.
• The company provides a one-stop shop for custom steel buildings and can meet the needs of factory environments with temperature requirements ranging from -30 to 50 degrees Celsius, as well as cranes with explosion-proof requirements.

Voltage Customization

• DGCRANE can customize generators to meet different voltage requirements around the world, whether the voltage is 100V~130V or 220~240V.

Sales Plans and Installation

Complete Overhead Crane

• A complete overhead crane includes all parts such as the trolley, cross girder, end trucks, and electrification systems. The crane is fully assembled and tested in the factory before being disassembled for shipping. This plan offers easy installation and is the most comfortable and time-saving option.

Component Overhead Crane

• This plan excludes the cross girder, which is the most costly part in terms of transport. Customers need to provide the cross girder locally, for which DGCRANE provides complete drawings and instructions. This option saves on transport costs but requires more labor and steel from the customer.

Global Reach and Clientele

• DGCRANE has exported cranes to numerous countries including Russia, Uzbekistan, Philippines, Bangladesh, Australia, Qatar, Tanzania, Singapore, Saudi Arabia, Peru, Brazil, and Nigeria.
• The company has worked with prominent global clients, such as the Italy-based IMF Group, the largest supplier of complete sets of foundry equipment in the world.

After-Sales Support

• DGCRANE is well-equipped with spare parts, which helps in compressing the production cycle, improving productivity, and enabling timely response in after-sales maintenance.

By choosing DGCRANE, customers can expect high-quality overhead and gantry cranes, customized solutions, and comprehensive after-sales support, making the company a reliable partner in the global crane manufacturing industry.

Top 10 Overhead Crane Manufacturer In China | WeiHuaCrane

Top 10 Overhead Crane Manufacturers in China: An In-Depth Guide

Introduction

China has emerged as a significant player in the global market for overhead cranes, driven by its large manufacturing capacity and relatively low labor costs. Here, we will explore the top 10 overhead crane manufacturers in China, highlighting their history, product range, and market standing.

Leading Manufacturers

1. Henan Weihua Heavy Machinery Co., Ltd.

• Established: 1989
• Headquarters: Anyang City, Henan Province
• Products: Lifting machinery, construction machinery, special vehicles, overhead cranes, and gantry cranes
• Market Position: Weihua Group is a leading machinery manufacturing enterprise in China, with the highest production and sales of overhead cranes and gantry cranes in the country. In 2018, their sales revenue reached 12.2 billion yuan.

2. Zoomlion Heavy Industry Group Co., Ltd.

• Established: 1993
• Headquarters: Changsha, Hunan Province
• Products: Bridge cranes, tower cranes, and other construction machinery
• Market Position: Zoomlion is one of the leading construction machinery manufacturers in China, known for its advanced production equipment and technology. The company provides high-quality products and services globally.

3. Langfang Hongqi Heavy Machinery Co., Ltd.

• Established: 1958
• Headquarters: Langfang City, Hebei Province
• Products: Bridge cranes and other heavy machinery
• Market Position: Langfang Hongqi has rich experience and technology, with product quality and performance leading in China. Their products are widely recognized and praised.

4. Henan Weineng Heavy Industry Machinery Co., Ltd.

• Established: 2004
• Headquarters: Zhengzhou City, Henan Province
• Products: Bridge cranes, gantry cranes, tower cranes, and other heavy machinery
• Market Position: Henan Weineng is committed to providing high-quality products and services with advanced production equipment and technology.

5. Shanghai Electric Group Co., Ltd.

• Established: 1880
• Headquarters: Shanghai
• Products: Bridge cranes, tower cranes, and other construction machinery
• Market Position: With a long history and rich experience, Shanghai Electric Group is a leading construction machinery manufacturer in China, known for its high-quality products and performance.

6. Harbin Electric Group Co., Ltd.

• Established: 1898
• Headquarters: Harbin
• Products: Bridge cranes, gantry cranes, and other heavy machinery
• Market Position: Harbin Electric Group has a long history and is recognized for its high-quality products and performance, leading in the Chinese market.

7. Henan Qiaoqiao Heavy Industry Co., Ltd.

• Established: 2003
• Headquarters: Nanyang City, Henan Province
• Products: Bridge cranes, gantry cranes, and other heavy machinery
• Market Position: The company has a professional R&D team and advanced production equipment, committed to providing high-quality products and services.

8. Hebei Shuangma Heavy Industry Machinery Manufacturing Co., Ltd.

• Established: 2002
• Headquarters: Xingtai City, Hebei Province
• Products: Bridge cranes, gantry cranes, and other heavy machinery
• Market Position: Hebei Shuangma has a skilled team and efficient production equipment, with product quality and performance widely recognized.

Product Range and Services

Types of Cranes

These manufacturers offer a wide range of overhead crane models, including:
– Single girder cranes
– Double girder cranes
– Gantry cranes
– Jib cranes
– Customized solutions for specific industries or applications

Additional Services

In addition to manufacturing, these companies provide:
– Installation services
– Maintenance services
– Repair services for their products

Manufacturing Process

The manufacturing process for overhead cranes typically involves several stages:
– Design: Detailed design and planning of the crane.
– Fabrication: Production of the crane components.
– Assembly: Assembly of the crane parts into a complete unit.
– Testing: Thorough testing to ensure the crane meets safety and performance standards.

Conclusion

China’s top overhead crane manufacturers are renowned for their advanced technology, high-quality products, and comprehensive services. Companies like Henan Weihua, Zoomlion, and Langfang Hongqi lead the market with their rich experience and commitment to innovation. These manufacturers play a crucial role in meeting the global demand for overhead cranes, catering to various industries with their diverse product range and customized solutions.

China Overhead Crane Manufacturer

Guide to Overhead Cranes

Introduction to Overhead Cranes

Overhead cranes are essential components in various industrial settings, including factories, warehouses, and workshops. They are designed to enhance efficiency and safety in material handling operations. Here is a comprehensive guide to help you understand the different types, specifications, and applications of overhead cranes.

Types of Overhead Cranes

Single Girder Overhead Cranes

• Design and Structure: Single girder overhead cranes feature a single I-beam or girder that supports the load. They are typically lighter and have lower lifting capacities compared to double girder cranes[5].
• Specifications:
• Capacity: Usually up to 15 tons, but can range from 1 to 20 tons[2][3].
• Span: Typically ranges from 7.5 to 31.5 meters[1][2].
• Lifting Height: Can vary from 6 to 30 meters[1][2].
• Lifting Speed: Generally between 0.8 to 5 meters per minute[2].
• Trolley Speed: Usually between 2 to 20 meters per minute[2].
• Applications: Ideal for lighter lifting tasks and where headroom is not a critical issue. They are cost-effective and easier to install and maintain[3][5].

Double Girder Overhead Cranes

• Design and Structure: Double girder overhead cranes have two girders that support the load, providing greater lifting capacity and stability. They are heavier and more robust than single girder cranes[5].
• Specifications:
• Capacity: Can range from 5 to 450 tons, with the largest capacities reaching up to 250 tons[2][5].
• Span: Typically ranges from 10.5 to 31.5 meters[1][2].
• Lifting Height: Can vary from 6 to 24 meters[1][2].
• Lifting Speed: Generally between 2.1 to 11.5 meters per minute[2].
• Trolley Speed: Usually between 27 to 40 meters per minute[2].
• Applications: Suitable for heavy-duty applications, such as in large factories, warehouses, and workshops where high lifting capacities are required. They offer increased headroom and greater lifting heights[1][4][5].

Mounting Types

Top Running Cranes

• Description: These cranes are mounted on top of the runway beams, which can be part of the building structure or a freestanding system.
• Benefits: Top running cranes achieve greater lifting heights compared to under running systems and are easier to install and service[3][5].
• Applications: Common in various industries where high lifting heights and easy maintenance are crucial.

Under Running Cranes

• Description: These cranes are mounted below the runway beams, typically attached to the building’s structural elements.
• Benefits: Under running cranes are suitable when headroom is limited, as they do not require the additional space needed for top running cranes[3][5].
• Applications: Ideal for facilities with low ceilings or where headroom is a significant constraint.

Key Components and Parameters

Capacity

• The lifting capacity of an overhead crane, which can range from a few tons to several hundred tons, depending on the type and design[1][2][5].

Span

• The horizontal distance between the runway beams, typically ranging from 7.5 to 31.5 meters for single girder cranes and 10.5 to 31.5 meters for double girder cranes[1][2].

Lifting Height

• The vertical distance the crane can lift, usually between 6 to 30 meters for single girder cranes and 6 to 24 meters for double girder cranes[1][2].

Lifting Speed and Trolley Speed

• The speed at which the crane lifts and moves the load, and the speed of the trolley along the girder, respectively. These speeds vary depending on the crane model and application[1][2].

Work Duty

• The classification of the crane’s work duty, often denoted by A3 to A7, indicating the frequency and intensity of use[1][2].

Specialized Overhead Cranes

European Type Double Girder Cranes

• Design: These cranes adopt European-style design structures, characterized by light weight, small wheel pressure, and reliable performance.
• Applications: Suitable for heavy-duty applications requiring high performance and durability[1].

Hoist Double Girder Cranes

• Design: Compact in size, these cranes have low building headroom requirements and are light in weight with low wheel pressure.
• Applications: Ideal for spaces with limited headroom and where a compact design is necessary[1].

Explosion Proof Overhead Cranes

• Design: Designed for use in hazardous environments, these cranes are built with explosion-proof components.
• Applications: Used in industries where there is a risk of explosions, such as chemical plants and oil refineries[2].

Installation and Maintenance

Installation

• Overhead cranes can be installed as part of the building structure or as freestanding systems. Top running cranes are easier to install compared to under running cranes[3][5].

Maintenance

• Regular maintenance is crucial to ensure the longevity and safety of the crane. This includes inspecting the hoist, trolley, and crane mechanisms, as well as lubricating moving parts[2].

Safety Considerations

• Safety is paramount when operating overhead cranes. Operators must be trained, and regular inspections should be conducted to ensure all components are in good working condition.
• Load testing and adherence to national standards are also essential for safe operation[2].

Customization

• Many manufacturers offer customized overhead crane solutions based on specific user requirements. This can include adjusting the span, lifting height, and capacity to fit the needs of the facility[1][2].

By understanding the different types, specifications, and applications of overhead cranes, you can make informed decisions to enhance the efficiency and safety of your material handling operations.

Top Overhead and Jib Crane Manufacturer in China

Company Profile of Shaoxing Nante Crane Equipment Co., Ltd.

Company Overview

Shaoxing Nante Crane Equipment Co., Ltd., often referred to as NANTE, is a leading integrated solution provider for cranes and crane components in China. With a history spanning over 30 years, NANTE has evolved from its inception to become a prominent name in the lifting and handling industry. The company is a part of the ZHONGJIAN Group and is dedicated to the research and development of new lifting and handling technologies.

Business Type and Operations

• Manufacturer/Factory & Trading Company: NANTE operates both as a manufacturer and a trading company, allowing it to offer a wide range of products and services.
• Production Capacity: The company has more than 100,000 square meters of production space, enabling it to produce 1,000 industrial cranes and 5,000 crane components annually.
• Plant Area: The factory is located in Lianxing Village, Dongguan Street, Shangyu District, Shaoxing City, Zhejiang, China, and covers an area of 5,006 square meters.

Products and Services

Lifting Equipments

• Construction: NANTE provides lifting equipment specifically designed for construction, including Beam Launchers, Gantry Cranes, Segment Lifters, Form Travelers, and Bailey Bridges.
• Industrial: The company offers a variety of industrial lifting equipment such as Overhead Cranes, Gantry Cranes, Jib Cranes, and Light Crane Systems.
• Crane Components: NANTE supplies a comprehensive range of crane components, including Electric Hoist & Trolley, End Carriage, Conductor Rail, Festoon System, Steel Rail, Flat Cable, Pendent Control, Geared Motor, and Remote Control.

Integrated Solutions

• Project Consultant: NANTE provides consulting services to help clients choose the right lifting solutions for their projects.
• Design: The company offers design services tailored to the specific needs of each client.
• Manufacturing: NANTE manufactures all its products with a focus on scientific design, good safety, high performance, efficient operation, and low maintenance costs.
• Transportation: The company handles the transportation of its products to ensure they reach clients safely and on time.
• Installation: NANTE provides installation services to ensure that the equipment is set up correctly and functions as intended.
• Maintenance and Technical Support: The company offers after-sale maintenance, spare parts support, and customized solutions to ensure the smooth operation of the lifting and handling equipment.

Quality and Certifications

• ISO Certifications: NANTE has obtained ISO 9001, ISO 14001, and ISO 45001 certifications, ensuring superior quality and adherence to international standards.
• Quality Assurance: The company is committed to delivering high-quality products and services, backed by a wealth of industrial experience in the lifting industry.

Research and Development

• R&D Capacity: NANTE has its own R&D department with 5-10 staff members, focusing on OEM and ODM capabilities.
• Innovative Technologies: The company adopts innovative ideas and designs in developing new products and services, ensuring they meet the latest industry standards.

Export and International Presence

• Export Year: NANTE has been exporting its products since 2011.
• Export Percentage: The company exports 51% to 70% of its products.
• Main Markets: NANTE’s main export markets include Southeast Asia, the Middle East, and Australia.
• Commercial Terms: The company offers various commercial terms such as FOB, CIF, and CFR, and accepts multiple payment methods including LC, T/T, D/P, PayPal, and Western Union.

Recent Developments

• New Workshop: NANTE recently started building a new workshop, marking an important milestone in its development history.
• Canton Fair Participation: The company has successfully participated in the 136th China Import and Export Fair, showcasing its latest products and achieving significant success.

Commitment to Customers

• Customer First: NANTE is committed to its service concept of “Customer First,” providing presale technical support, after-sale maintenance, spare parts support, and customized solutions to ensure customer satisfaction.

By combining innovative technologies, high-quality products, and comprehensive services, NANTE continues to be a reliable and leading supplier in the global crane and crane components market.

Overhead Crane Components – China Heavy Crane Supplier …

Overhead Crane Components: A Comprehensive Guide

Introduction

Overhead cranes, also known as bridge cranes, are essential pieces of equipment in various industries for material handling and lifting operations. Understanding the components of an overhead crane is crucial for their effective operation, maintenance, and customization. Here is a detailed guide to the key components and their functions.

Main Components of an Overhead Crane

Bridge

The bridge is the primary structural component of an overhead crane, spanning the width of the building. It can be configured in two main types:
– Single Girder: This type consists of a single bridge girder supported by two end trucks. It is more economical and suitable for lighter loads and shorter spans[3][4][5].
– Double Girder: This type features two bridge girders supported by the end trucks, offering greater load capacity, longer spans, and increased hook height. It is ideal for heavier loads and more demanding applications[3][4][5].

End Trucks

End trucks are located on either side of the bridge and house the wheel assemblies. These allow the bridge to move along the designated path on the runways. Each end truck can have a configuration of 2, 4, or 8 wheels based on the crane’s capacity[2][4][5].

Runways and Runway Rails

Runways are the beams or tracks that the bridge crane travels on to move up and down the bays. Runway rails are supported by the runways and provide the path for the end trucks to ride on. Top-running cranes typically use ASCE/railroad rails[4][5].

Trolley

The trolley is a critical component that travels along the bridge, providing the initial horizontal movement. It supports the hoist and can be customized to accommodate various hoists with different lifting capacities.

Key Components of a Trolley

• Hoist: Mounted on the trolley frame, the hoist provides the vertical motion using wire rope or chain. It includes components such as the gearbox, motors, drum, brakes, upper sheave assembly, equalizer, and hook assembly[1][2][4].
• Trolley Travel Assembly: This assembly controls the trolley’s cross travel and includes a gearbox, motor, line shaft, and brakes. It allows the crane operator to control the trolley’s speed[1].
• Frame: The trolley frame serves as the foundation for the mechanical components. It provides a platform for the hoist, transfers the hoisting load to the wheel assemblies, and mounts the travel mechanicals[1].
• Wheel Assemblies: Housed by the frame, the wheel assemblies enable the trolley’s horizontal movement along the bridge rails. Typically, trolleys are equipped with four, six, or eight wheels[1][2].

Hoist

The hoist is responsible for lifting, lowering, and holding the load. It can be powered manually, electrically, or pneumatically.

Types of Hoists

• Wire Rope Hoists: Generally used for heavier lifting and more durable[2].
• Chain Hoists: More suitable for lighter loads and typically more cost-effective[2].

Controls and Electrification

Crane controls can vary from pendant stations to wireless radio controls and sophisticated control panels with automation capabilities.

Electrical Components

• Insulated Conductor Bars or Festoon Systems: These supply power to the crane from the building, powering components such as the hoist, trolley, and bridge[5].
• Pendant or Remote Radio Console: Allows the operator to control the crane, including the drive and hoist motors, and variable frequency drives (VFDs) for precise load positioning[4][5].

Safety Features

• Overload Protection: Prevents the crane from lifting loads beyond its capacity.
• Limit Switches: Ensure the crane does not travel beyond its designated path.
• Emergency Stop Functions: Allow for immediate cessation of crane operation in case of an emergency[2][4].

Additional Components

Bumpers

Bumpers are designed to absorb the crane’s energy and reduce impact when the crane or trolley reaches the end of its travel, bringing it to rest in a controlled manner[4].

Columns

For ceiling-mounted cranes that cannot be supported by the building structure, columns are installed to provide additional support. The height and number of columns depend on the lift height requirements and the facility’s vertical space[5].

Customization and Maintenance

Customizable Trolleys

Trolleys can be customized to fit specific needs, including varying sizes, number of hooks, and lifting capacities. Additional safety features such as handrails, hoist speed control, and weigh systems can also be incorporated[1].

Regular Maintenance

Regular servicing and replacement of components are essential to ensure the safe and efficient operation of the overhead crane. Signs of wear and tear, such as increased noise, decreased performance, and visible wear, indicate the need for component replacement[2][3].

Conclusion

Understanding the components of an overhead crane is vital for their optimal use and maintenance. Each component plays a critical role in the crane’s overall function, and knowing how they work together can help in selecting the right equipment for specific applications and ensuring safe and efficient operations.

Dongqi Crane: Overhead Crane Hoist Manufacturer and …

Guide to DQCRANES: A Leading Crane Manufacturer

Company Overview

DQCRANES, operated by HENAN DONGQI MACHINERY CO., LTD, is a top crane manufacturer in China. The company is founded on advanced European technology research and development, focusing on innovation in the design and production of non-standard cranes, hoists, and other lifting equipment.

Manufacturing Facilities

• Location: DQCRANES’ factory is situated in Dongqi Industry Park in Changyuan, Henan, known as the “Cradleland of Cranes.”
• Size and Capacity: The factory spans 240,000 square meters and employs over 3600 employees, including 500 technicians and more than 70 senior engineers.
• Production Equipment: The facility is equipped with over 2000 sets of crane production equipment, enabling the production of more than 10,000 cranes and hoists annually.
• Automation and Technology: The manufacturing plant is highly automated, utilizing advanced facilities from domestic and international brands to ensure precision, cost-efficiency, and high-quality products.

Research and Development

• R&D Center: DQCRANES has a dedicated Research & Development Center that provides advanced technology support.
• Technical Departments: The center includes various specialized rooms such as gantry crane design, bridge crane design, hoist design, electric apparatus design, testing room, and craft design room.
• Technicians and Engineers: More than 60 medium and superior project technicians are dedicated to meeting specific material handling requirements.

Products and Services

Crane Types

• Overhead Cranes: DQCRANES manufactures European-style bridge cranes, including LH type double girder overhead cranes (capacity 3ton to 50ton) and LD type single girder overhead cranes (capacity 1ton to 32ton)[2][4].
• Gantry Cranes: Common type single girder gantry cranes are applied to open warehouses or rail along for general handling. Capacities vary depending on the type and application[2][4].
• Jib Cranes: Customizable jib cranes are available for various material handling needs.
• Port Cranes: DQCRANES provides world-level portal crane design, manufacture, installation, and maintenance services. Products include Shore-to-Shore Quayside Container Cranes, Rail Mounted Container Gantry Cranes, Single Jib Portal Cranes, and Rubber Tyre Container Gantry Cranes[3].

Customization

• Tailored Solutions: DQCRANES offers customized crane services to meet specific client requirements, leveraging advanced technology and economic efficiency.
• Industry Applications: Their products are widely applicable to multiple fields such as steel, electric power, petrochemical industry, machine building, war industry, warehouse logistics, and papermaking[1][4].

Quality and Workforce

• Certified Workforce: The fabrication craftsmen, including welders and electricians, are certified and skilled. Many employees participate in various training programs to enhance their professional skills.
• Work Ethic: The workforce is known for their serious attitude towards work, modesty in learning from each other, and diligence in polishing their professional skills[2].

Safety and Reliability

• Safety Standards: DQCRANES ensures the safety and reliability of their port crane operations and other material handling equipment through high-level services and state-of-the-art solutions[3].

Global Reach and Customer Service

• Annual Output: The comprehensive annual output value of DQCRANES has been significant, reaching 15 billion RMB in 2014.
• Customer Support: The company is committed to providing the best customized crane services to clients, with a focus on high technology and economic efficiency[2].

By combining advanced European technology, a highly skilled workforce, and a commitment to quality and safety, DQCRANES stands as a leading provider of lifting solutions across various industries.

Overhead Crane 20t load

Double Girder Overhead Crane with Dual Hoist: A Comprehensive Guide

Introduction

Double girder overhead cranes are robust and versatile lifting solutions, often used in heavy-duty applications across various industries. Here is a detailed guide to help you understand the key aspects, benefits, and specifications of a double girder overhead crane with a dual hoist.

Structure and Design

• Main Beams: These cranes feature a robust box-shaped double main beam design, ensuring high strength, rigidity, and stability. This structure is particularly effective for handling heavy loads and withstanding the stresses of frequent use[2].
• Wheel and End Trucks: The cranes are equipped with forged steel wheels hardened to a minimum of 325 Bhn, which operate on rails. The end trucks are fabricated from plates welded to a rigid frame, often with a stationary axle[1].

Performance and Operation

• Lifting Capacity: Double girder overhead cranes can handle a wide range of lifting capacities, from 20 tons to over 500 tons, making them ideal for heavy lifting projects[2].
• Speed and Efficiency: These cranes are designed for high-speed operation and efficient production. They can be equipped with frequency conversion motors for enhanced safety, reliability, and stability[2].
• Duty Cycle: They are suitable for high-duty cycle applications, meeting or exceeding CMAA Class C service standards. Standard speeds can range from 50 to 120 feet per minute (FPM)[1].

Components and Features

Dual Hoist

• Versatility: The use of dual hoists allows for greater flexibility in lifting operations. Each hoist can be controlled independently, enabling the crane to handle multiple loads simultaneously or to distribute the weight of a single heavy load more evenly[5].
• Load Distribution: Dual hoists ensure better load distribution, reducing the strain on the crane and increasing safety during lifting operations.

Motors and Drives

• Motor Type: The bridge drive motors are typically flange-mounted with a standard NEMA C or D flange and are 30-minute rated with Class F insulation. Thermal detectors in the motor windings provide overload protection[1].
• Gearbox: The crane drives often use double or triple reduction parallel shaft, helical/spur reducers that are splash lubricated for dependable service and longer life[1].

Safety and Compliance

• Standards: These cranes are built to meet or exceed CMAA design specifications, as well as OSHA and ANSI standards. They have a minimum deflection of 1/600 and a built-in safety factor of 5 to 1[1].
• Regular Inspections: Regular and thorough inspections are crucial to ensure compliance with safety standards and regulations. This includes inspections of the crane, hoists, and below-the-hook devices[4].

Customization and Configuration

• Span and Lifting Height: The span of the crane, which is the distance between the runway beams, and the lifting height, which is the distance from the ground to the highest point the crane needs to lift, can be customized to fit specific workspace requirements[2].
• Runway Configuration: Custom fabrication of runways in different configurations is possible to meet the unique needs of various industries and applications[1].

Applications

• Industry Use: Double girder overhead cranes are widely used in industries such as aerospace, automotive, construction, defense, food processing, heavy machinery, mining, oil & gas, paper, steel production, and utilities[4].
• Work Environment: They are ideal for demanding environments where high-speed operation and efficient production are critical.

Maintenance and Support

• Maintenance Services: Preventive maintenance and repair services are essential to ensure the crane operates optimally. This includes 24/7 emergency breakdown service[4].
• Training Programs: Various training programs are available, including operator training, inspection and maintenance training, and safety sessions to ensure safe and efficient operation[4].

Cost Considerations

• Price Variability: The price of a double girder overhead crane varies based on factors such as lifting capacity, span length, lifting height, and custom configurations. Additional features and materials used can also impact the cost[2].
• Example Pricing: For instance, a 10-ton capacity double girder overhead crane kit can cost around $25,780[3].

By understanding these aspects, you can make an informed decision when selecting and implementing a double girder overhead crane with a dual hoist for your specific lifting needs.

1 Ton to 50 Ton Overhead Cranes in China, Types …

Given that the specific website you mentioned is not among the provided sources, I will create a comprehensive guide based on the information from the other sources, which cover a wide range of topics related to overhead cranes.

Guide to Overhead Cranes: Types and Specifications

Introduction

Overhead cranes are essential in various industrial settings, including factories, warehouses, and workshops, for efficient and safe material handling. Understanding the different types and specifications of overhead cranes is crucial for selecting the right equipment for your needs.

Types of Overhead Cranes

Single Girder Overhead Cranes

• Description: These cranes use a single bridge beam to support the trolley and hoist. They are generally lighter and more cost-effective than double girder cranes[2][3][5].
• Capacity: Typically ranges from 1 to 32 tons[1][2][3].
• Span: Can vary from 3 to 31.5 meters[1][2][3].
• Lifting Height: Customizable, often between 6 to 30 meters[2][3].
• Applications: Suitable for lighter lifting tasks and smaller workspaces.

Double Girder Overhead Cranes

• Description: These cranes use two bridge girders to support the trolley and hoist, providing greater lifting capacity and higher hook heights[2][3][5].
• Capacity: Ranges from 5 to 550 tons[1][2][3].
• Span: Typically between 10.5 to 31.5 meters[1][2][3].
• Lifting Height: Customizable, often between 6 to 24 meters[2][3].
• Applications: Ideal for heavy-duty applications, such as in metal or steel mills, and for handling large and long loads[1][2][3].

Specialized Overhead Cranes

Explosion-Proof Overhead Cranes

• Description: Designed with explosion-proof parts and components for use in hazardous environments[1].
• Capacity: Typically up to 75 tons[1].
• Applications: Used in areas where there is a risk of explosion.

Insulation Overhead Cranes

• Description: Designed for use in environments requiring electrical insulation[1][3].
• Capacity: Typically up to 50 tons[1].
• Applications: Used in high-voltage or sensitive electrical environments.

Magnetic Overhead Cranes

• Description: Equipped with electromagnetic chucks or beam spreaders for handling metal loads[1][3].
• Capacity: Typically up to 32 tons[1].
• Applications: Widely used in metal or steel mills.

Ladle Overhead Cranes

• Description: Specialized for handling hot metal liquids with dual braking systems for enhanced safety[1].
• Capacity: Typically up to 74 tons[1].
• Applications: Used in foundries and steel mills.

Key Specifications

Capacity

• The maximum weight that the crane can lift, ranging from a few tons to several hundred tons[1][2][3].

Span

• The distance between the two runway beams or columns that support the crane, typically ranging from 3 to 31.5 meters[1][2][3].

Lifting Height

• The maximum height the crane can lift a load, which can be customized based on the workspace requirements[2][3].

Coverage Area

• The area over which the crane can operate, usually described as a square or rectangle with unlimited length along the runway[1].

Lifting Speed

• The speed at which the hoist can lift the load, varying from a few meters per minute to over 10 meters per minute[2][3].

Trolley Speed

• The speed at which the trolley moves along the bridge beam, typically ranging from 20 to 40 meters per minute[2][3].

Crane Speed

• The speed at which the entire crane moves along the runway, usually between 30 to 75 meters per minute[2][3].

Work Duty

• The classification of the crane based on its usage and load cycle, often categorized from A3 to A7[2][3].

Components and Configurations

Top Running and Under Running Cranes

• Top Running: The bridge beam travels on rails mounted on top of the runway beams, offering greater lifting height and easier installation[4][5].
• Under Running: The bridge beam travels on the bottom flange of the runway beam, supported by the roof structure of the building[5].

Gantry Cranes

• Description: These cranes have legs on both sides of the span and can travel on the ground or on embedded rails, eliminating the need for overhead runways[5].
• Applications: Used in areas where overhead runways are not feasible.

Jib Cranes

• Description: Compact cranes with a boom arm that supports a moving hoist, ideal for limited space and precise load positioning[4][5].
• Applications: Used in workstation environments where floor space is maximized.

Installation and Customization

Runway Systems

• The runway beams can be supported by free-standing columns or the existing columns of the building. Moment columns are often used for greater stability[4].

Ceiling Mounted Cranes

• These cranes are mounted to the building trusses or other support structures, requiring longitudinal and lateral bracing[4].

Customization

• Many manufacturers offer customized services to tailor the crane’s specifications to the user’s requirements, including adjustable spans, heights, and capacities[1][2][3].

Conclusion

Selecting the right overhead crane involves a thorough understanding of the different types, their specifications, and the specific needs of your workspace. Whether you require a single girder crane for lighter tasks or a double girder crane for heavy-duty applications, ensuring the crane meets your capacity, span, and lifting height requirements is crucial for efficient and safe material handling.

China Crane Spare Parts Manufacturers, Suppliers, Factory

Since the specific website https://www.sevenindustry.com/crane-spare-parts/ is not accessible in the provided search results, I will create a comprehensive guide based on the general information about crane spare parts and components, using the details from the other sources.

Guide to Essential Crawler Crane Parts and Spare Components

Introduction

Crawler cranes are complex machines that rely on numerous components to operate efficiently and safely. Understanding these parts is crucial for maintenance, repair, and optimal performance. This guide outlines the key components of a crawler crane and the importance of each.

A. Major Components of a Crawler Crane

B. Boom and Jib

• Boom: The main structural element of the crane that lifts and moves loads.
• Fixed Boom: A rigid boom that does not change length.
• Telescoping Boom: A boom that can extend or retract to adjust its length.
• Jib: An extension of the boom that provides additional reach.
• Fixed Jib: A jib that is fixed in place.
• Luffing Jib: A jib that can be angled to change the lifting position[1].

C. Engine and Power System

• Engine: The power source of the crane, typically a diesel engine or electric motor.
• Cylinder Block
• Pistons
• Crankshaft
• Fuel System
• Cooling System
• Exhaust System[1].

D. Drum and Winch System

• Drum: A cylindrical component housing the wire rope for hoisting and lowering loads.
• Single-drum
• Double-drum
• Multi-drum Configurations[1].
• Winch: A mechanical device used to hoist and lower loads.
• Main Winches
• Auxiliary Winches
• Luffing Winches[1].

E. Hook Block

• Hook Block: Connects the load to the crane’s wire rope.
• Single-hook
• Double-hook
• Multi-hook Blocks[1].

F. Mast and Undercarriage

• Mast: Provides support and stability to the crane.
• Lattice Mast
• Tubular Mast[1].
• Undercarriage: The lower part of the crane that supports and propels it.
• Crawler Tracks
• Track Rollers
• Sprockets
• Idlers[1].

G. Outriggers and Track Shoes

• Outriggers: Hydraulic or mechanical extensions that provide additional stability.
• Front Outriggers
• Rear Outriggers
• Side Outriggers[1].
• Track Shoes: Components that come into direct contact with the ground.
• Single Grouser
• Double Grouser
• Triple Grouser[1].

H. Slewing Ring

• Slewing Ring: A large bearing that allows the crane’s upper structure to rotate.
• Inner Race
• Outer Race
• Rolling Elements[1].

II. Importance of Spare Parts and Maintenance

A. Availability of Spare Parts

• Ensuring that spare parts are readily available is crucial for minimizing downtime and maintaining operational efficiency. Companies like Konecranes and Manitowoc provide extensive inventories of original equipment manufacturer (OEM) and aftermarket parts for various crane models[2][5].

B. Types of Spare Parts

• Original Equipment Manufacturer (OEM) Parts: These are parts made by the crane’s original manufacturer, ensuring compatibility and quality.
• Aftermarket Parts: These are parts made by third-party manufacturers, often at a lower cost but still meeting quality standards[2].

C. Maintenance Kits and Guides

• Regular maintenance is essential for the longevity and performance of the crane. Maintenance kits and guides, such as those provided by Manitowoc, help in scheduling and performing routine maintenance tasks[5].

III. Specialized Components and Accessories

A. Hoisting Equipment

• Manual Chain Hoists: Efficient tools requiring minimal maintenance, often used in specific environments[4].
• Electric Chain Hoists: Equipped with features like load limiters, gearboxes, and lifting motors, these are used for heavy-duty lifting operations[4].

B. Suspension and Lifting Equipment

• Hook Blocks: Designed with safety features like safety catches and multiple sheaves to handle various loads.
• Slings and Chains: Made from high-quality materials to ensure durability and safety[4].

C. Control and Safety Devices

• Limit Switches: Precise devices that limit the hook travel to prevent overloading.
• Load Limiters: Devices that prevent overloading by triggering a slip clutch[4].

IV. Conclusion

Understanding the various components of a crawler crane and having access to the right spare parts is vital for maintaining the crane’s performance and ensuring safety. Regular maintenance, using the correct spare parts, and understanding the specialized components and accessories can significantly extend the life of the crane and optimize its operation.

Chinese Standard Single Girder Overhead Crane

Guide to Chinese Standard Single Girder Overhead Cranes

Introduction

Chinese Standard Single Girder Overhead Cranes are widely used in various industrial settings, including steel plants, hydro-power stations, warehouses, and workshops. These cranes are designed and manufactured according to Chinese national standards, ensuring reliability, efficiency, and safety.

Types of Single Girder Overhead Cranes

Traditional Single Girder Cranes

These cranes are the most common type and are known for their simplicity and cost-effectiveness.
– Capacity: Typically ranges from 1 to 20 tons[4][5].
– Span: Can vary from 7.5 to 31.5 meters[4][5].
– Lifting Height: Usually available in heights of 6, 9, 12 meters, or custom heights as required[4].

European Type Single Girder Cranes

These cranes are designed with advanced European technology and offer higher efficiency and durability.
– Capacity: Ranges from 1 to 32 tons, with some models up to 50 tons[1][5].
– Span: Similar to traditional cranes, ranging from 7.5 to 28.5 meters[1][5].
– Lifting Height: Generally available in heights of 6 to 30 meters[1][5].

Technical Parameters

Capacity and Span

• Capacity: From 0.5 tons to 20 tons, with some models extending up to 32 tons or more[1][4][5].
• Span: The span of the crane can range from 3 meters to 31.5 meters, depending on the model and application[1][4][5].

Lifting Speed and Height

• Lifting Speed: Varies from 0.8 to 8 meters per minute, depending on the load and crane model[1][2][5].
• Lifting Height: Can be customized but typically ranges from 6 to 30 meters[1][4][5].

Trolley and Crane Speed

• Trolley Speed: Usually around 20 meters per minute, with some models offering speeds up to 30 meters per minute[1][2][5].
• Crane Speed: Also typically around 20 meters per minute, with some models offering speeds up to 30 meters per minute[1][2][5].

Working Classification

• Working Duty: Classified under A3 to A6, depending on the usage frequency and environment[1][2][5].
• A3: Light duty, suitable for intermittent operations.
• A4: Medium duty, suitable for regular operations.
• A6: Heavy duty, suitable for continuous operations.

Main Components and Dimensions

Main Girder

• Type: Can be either I-beam or box-typed girder[4].
• Height: Varies depending on the span and capacity, typically ranging from 900 to 1450 mm[3].

Rail and Track

• Rail Type: Commonly P18, P24, or P30 tracks[1][3].
• Wheel Base: Varies from 1500 to 4000 mm, depending on the span and capacity[2][3].

Hook and Crane Dimensions

• Hook Left and Right Limitations: These are critical for ensuring safe operation and vary based on the crane’s span and capacity[2][3].
• Crane Width and Base Distance: These dimensions are crucial for installation and operation, typically ranging from 2000 to 4700 mm in width and 1500 to 4000 mm in base distance[2][3].

Installation and Maintenance

Installation Requirements

• Rail Installation: The crane rails must be installed on a level and stable surface to ensure smooth operation.
• Electrical Connections: Proper electrical connections are necessary to power the crane’s motors and control systems.

Maintenance

• Regular Inspections: Regular inspections are essential to ensure the crane’s components are in good condition.
• Lubrication and Cleaning: Regular lubrication of moving parts and cleaning of the crane are necessary to maintain its efficiency and longevity.

Safety Features

Load Limits

• Maximum Load: The crane should never be loaded beyond its rated capacity to avoid accidents and damage.
• Load Balance: Ensuring the load is balanced is crucial for stable operation.

Safety Devices

• Overload Protection: Many cranes come equipped with overload protection devices to prevent lifting loads beyond the crane’s capacity.
• Limit Switches: These switches prevent the crane from moving beyond its designated limits, ensuring safe operation.

Applications

Industrial Settings

• Steel Plants: Used for handling heavy steel materials and equipment.
• Hydro-Power Stations: Utilized for maintenance and operation tasks.
• Warehouses and Workshops: Used for general lifting and moving of goods and equipment.

Customization and Design

Custom Span and Height

• Cranes can be customized to fit specific span and height requirements of the user[4][5].

Specialized Hoisting Systems

• Different types of hoisting systems such as wire rope, chain, and fem electric hoists can be integrated based on the application needs[5].

By understanding these aspects, users can make informed decisions when selecting and operating a Chinese Standard Single Girder Overhead Crane, ensuring efficient, safe, and reliable operation in their industrial environment.

Frequently Asked Questions (FAQs)

What are the main components of an overhead crane?

The main components of an overhead crane include the bridge, lifting mechanism, crane and trolley travelling mechanisms, control room, and various auxiliary systems. The bridge is the basic structure composed of the main beam, end beams, and a walking platform with safety railings. The lifting mechanism consists of a motor, reducer, drum, and brake, which work together to lift and lower the load using a steel wire rope. The crane and trolley travelling mechanisms enable the crane to move longitudinally and the trolley to move laterally along the bridge. The control room houses the control devices for the crane and trolley movements, lifting mechanisms, and safety protection devices.

How does the lifting mechanism of an overhead crane work?

The lifting mechanism of an overhead crane is designed to lift and lower loads efficiently. It is composed of a motor connected to a reducer through a coupling and brake wheel. The output shaft of the reducer is connected to a drum wound with a steel wire rope. The other end of the wire rope is attached to a hook. When the drum rotates, the hook rises or lowers with the winding or unwinding of the wire rope. For overhead cranes with a lifting capacity of 15 tons or more, there are often two sets of lifting mechanisms: the main hook and the auxiliary hook, which provide additional lifting capability and flexibility.

What is the function of the control room in an overhead crane?

The control room, or cab, is a critical component of an overhead crane that houses the control devices for the crane’s operations. It typically includes controls for the crane and trolley movements, lifting mechanisms, and various safety protection devices. The cab is usually fixed at one end of the main beam, although some designs have it mounted below the trolley to move with it. The control room ensures safe and efficient operation of the crane by providing operators with the necessary controls and monitoring systems to manage the crane’s movements and lifting operations.

How do the crane and trolley travelling mechanisms work?

The crane and trolley travelling mechanisms are essential for the mobility of an overhead crane. The crane travelling mechanism allows the crane to move longitudinally along the runway beams, driven by motors, transmission shafts, reducers, wheels, and brakes. There are two common driving modes: centralized driving and separate driving. The trolley travelling mechanism, on the other hand, enables the trolley to move laterally along the bridge girder. It consists of a trolley frame, trolley running mechanism, and lifting mechanism. The trolley can move along the track on the main beam, facilitating the lateral movement of the load within the workshop.

What is the importance of the bridge in an overhead crane?

The bridge is the foundational component of an overhead crane, providing the structural framework that supports the entire system. It is typically composed of the main beam, end beams, and a walking platform with safety railings. The main beam is usually a box-shaped structure, and the end beams are connected at both ends of the main beam. The bridge supports the crane running mechanism on one side and the power supply system for the trolley on the other. It ensures the stability and structural integrity of the crane, allowing it to move along the guide rail throughout the workshop and perform its lifting and moving functions safely and efficiently.