In the dynamic and ever-evolving world of industrial and marine operations, the davit crane stands out as a versatile and essential piece of equipment. Whether you are involved in shipbuilding, offshore operations, or general material handling, understanding the intricacies and benefits of davit cranes is crucial for optimizing efficiency and safety.

This in-depth guide delves into the world of davit cranes in China, a hub of innovative manufacturing and stringent quality standards. Here, you will discover the various types of davit cranes, including fixed and adjustable boom models, as well as specialized versions like pipe handling and hydraulic gravity davits. You will learn about their key features, such as 360º continuous rotation, simultaneous operation of multiple functions, and the use of high-quality materials like heat-treated stainless steel.

The guide will also compare davit cranes with other lifting solutions, such as gantry cranes, highlighting their unique advantages, including compact designs, cost savings, and flexible mounting options. Additionally

Marine Davit Crane Manufacturer in China

Since the specific website you mentioned (https://ouco-industry.com/marine-davit-crane/) is not accessible in the provided search results, I will create a comprehensive guide based on the general information about marine davit cranes gathered from the other sources.

Marine Davit Cranes: A Comprehensive Guide

Introduction

Marine davit cranes are essential pieces of equipment for various marine operations, including the handling of rescue boats, supplies, and other materials on vessels and at dock locations. This guide will cover the key features, uses, and considerations for marine davit cranes.

Features of Marine Davit Cranes

Construction and Materials

• Marine davit cranes are often constructed with high-tensile steel or fully galvanized bodies to ensure durability and resistance to corrosion, especially in harsh saltwater environments[2][3].
• Stainless steel components, such as columns, booms, winches, and hardware, are commonly used to enhance corrosion resistance[3].

Safety and Reliability

• Anti two-block systems and winch downstop systems are integrated to prevent accidents and ensure safe operation[1].
• Emergency backup power systems are available for operation in dead-ship conditions[1].
• Hot-dip galvanizing is preferred for its superior corrosion resistance compared to paint or powder coating[2].

Customization and Options

• Davit cranes can be customized to meet specific operational needs, including adjustable boom lengths, heights, and finishes[3].
• Options may include constant tension winch systems, LED flood lights, and customer-specific pedestal heights[1].
• Electric or hydraulic soft start systems and reservoir heaters or coolers can also be integrated[1].

Types of Marine Davit Cranes

Fixed Boom vs. Articulating Boom

• Fixed boom configurations are simpler and more robust, while articulating boom configurations offer greater flexibility and reach[1].

Knuckle Boom

• Knuckle boom davits provide a more versatile lifting solution with the ability to fold back, allowing for better stowage and maneuverability[1].

Electric and Manual Winches

• Electric davit cranes feature powered winches, while manual winches can be operated using a cordless drill or manual handle for cost-effective solutions[3].

Uses of Marine Davit Cranes

Rescue Boat Handling

• Davit cranes are designed to safely retrieve rescue boats from rough seas, meeting or exceeding industry standards such as SOLAS certification[1].

Supply Handling

• These cranes are used for loading and unloading supplies, small boats, hoses, and other materials on vessels and at dock locations[2].

Barge Haul Systems

• Davit cranes are useful in barge haul systems for lifting and lowering rigging, guidelines, and other items between the barge and the operation platform[2].

Installation and Maintenance

Mounting Options

• Davit cranes can be floor-mounted, wall-mounted, or mounted on wheels, offering flexibility in installation[3].

Corrosion Protection

• Regular maintenance includes ensuring the integrity of the corrosion-resistant coatings and replacing components as necessary[2].

Emergency Backup Systems

• Regular checks on emergency backup power systems are crucial to ensure they are functional in case of primary power failure[1].

Safety Considerations

Overturning Moment and Capacity

• It is critical to select a davit crane with the appropriate capacity and overturning moment to handle the intended loads safely[1].

Brake Mechanisms

• Industry-leading brake mechanisms are essential to prevent uncontrolled lowering of loads[2].

Training and Operation

• Proper training for operators is vital to ensure safe and efficient use of the davit crane[1].

Conclusion

Marine davit cranes are versatile and critical components in marine operations, offering a range of features and customization options to meet specific needs. By understanding the construction, safety features, types, uses, and maintenance requirements of these cranes, users can ensure safe and efficient operations in various marine environments.

Davit Cranes

Guide to Prowinch Davit Cranes

Introduction

Prowinch offers a range of davit cranes designed to meet various lifting and hoisting needs, particularly in environments such as docks, boats, workshops, and construction sites. Here is a comprehensive guide to their davit cranes, highlighting key features, technical specifications, and usage scenarios.

Types of Davit Cranes

1000 lbs Davit Cranes

• Load Capacity: Up to 1100 lbs (500 kg)[2][4].
• Power Options: Available in 110V, 220V, and 12V configurations[2][4].
• Key Features:
• Adjustable telescopic boom system with 3 heights and positions.
• 360-degree swivel for optimal maneuverability.
• Wireless electric winch for easy operation.
• Removable boom for easy transportation and storage.
• Quick-acting electromagnetic brake, emergency stop, safety key, and limit switch[2][4].

2000 lbs Davit Cranes

• Load Capacity: Up to 2000 lbs (907 kg)[3].
• Power Options: Available in 220V configuration[3].
• Key Features:
• Adjustable telescopic boom system with 3 heights and positions.
• 360-degree swivel for maximum maneuverability.
• Wireless electric winch for effortless operation.
• Durable construction built from high-quality materials.
• Removable boom for easy transportation and storage[3].

Hydraulic Davit Cranes

• Load Capacity: Up to 2200 lbs (1000 kg)[5].
• Key Features:
• 360-degree swivel with automatic brake winch.
• Made from premium quality materials for heavy loads and intensive use.
• Equipped with a main bearing for smooth rotation, a forged steel hook, and a pulley for double-line mode.
• Lightweight, durable, and reliable, with intuitive use[5].

Technical Specifications

Electrical Davit Cranes

• Motor and Brake System:
• Equipped with an H1 electric wire rope hoist suitable for infrequent handling and servicing heavy equipment.
• Electromagnetic brake system tested at 125% of the hoist capacity, engaging immediately upon any loss of power[2][3][4].
• Operational Time Ratings:
• For uniformly distributed work periods: 12.5% max. operational time per hour, up to 75 starts per hour.
• For infrequent work periods: 15 minutes from a cold start, up to 100 starts per hour, calculated at a 65% load factor as per ASME Standards[2][3][4].
• Voltage and Power:
• Available in 110V, 220V, and 12V configurations.
• Motor power varies by model, e.g., 1450 W for the 110V model[2][4].
• Safety and Compliance:
• Compliant with various standards including UL N 1340, CAN/CSA C22.2, EN14492-2, and EN60204-32[2][3][4].

Hydraulic Davit Cranes

• Construction and Materials:
• Made from premium quality materials to withstand heavy loads and intensive use.
• Equipped with a main bearing for smooth rotation, a forged steel hook, and a pulley for double-line mode[5].
• Dimensions and Weight:
• Total unit weight approximately 125 lbs (57 kg).
• Dimensions vary by model, e.g., total height of 75 inches, width of 31 inches, and depth of 10 inches[5].

Installation and Usage

Mounting and Installation

• Convenient Mounting Plate: Easy installation with a convenient mounting plate[2][3][4].
• Adjustable Boom: Adjustable telescopic boom system with multiple heights and positions for optimal positioning[2][3][4].

Operation

• Wireless Remote Control: Included wireless remote control for added convenience and easy operation[2][3][4].
• Emergency Features: Equipped with emergency stop, safety key, and limit switch for enhanced safety[2][3][4].

Maintenance and Warranty

• Warranty: 1-year warranty, customer support, and service available in the USA[2][3][5].
• Quality Assurance: Final assembly and all tests performed in the US to ensure every unit meets the corresponding standards[2][3][4].

Applications

Docks and Boats

• Ideal for use on docks and boats due to their foldable design and 360-degree swivel, allowing for easy storage and optimal maneuverability[2][4].

Workshops and Construction Sites

• Suitable for heavy-duty applications in workshops, warehouses, and construction sites, enhancing efficiency and safety in various lifting tasks[3].

Conclusion

Prowinch davit cranes are designed to offer a high price-performance ratio, with key components constantly tested and improved to meet the highest quality standards. Whether you need a crane for infrequent handling or heavy-duty applications, Prowinch provides a range of options with advanced features such as wireless electric winches, adjustable telescopic booms, and robust braking systems. These cranes are versatile, reliable, and designed to meet various UL safety requirements, making them a valuable addition to any lifting and hoisting setup.

Pipe Handling Davit Crane

Since the provided URL does not lead to a specific webpage with detailed information on the topic, I will create a comprehensive guide based on the general information about davit cranes from the other sources.

Guide to Davit Cranes

What are Davit Cranes?

Davit cranes are specialized lifting devices consisting of a base, a davit arm (or boom), and either a winch or hoist. These components work together to raise and lower heavy equipment, machinery, and materials.

Components of a Davit Crane

• Base: The foundation of the davit crane, which provides stability and support.
• Davit Arm (Boom): An angled beam that can pivot on a vertical axis, allowing for flexible movement and positioning.
• Winch or Hoist: Used to raise and lower loads. This can be a chain hoist, manual winch, or power winch[1][3][4].

Where are Davit Cranes Used?

Davit cranes are widely utilized in various industries, including:

Wastewater Facilities

• Lifting pumps, motors, and other mechanical equipment essential for wastewater treatment and processing.
• Moving pipes, valves, and other materials critical for wastewater flow and control.
• Personnel lifting for maintenance and inspection of elevated areas such as tanks and treatment equipment[1].

Other Industries

• Construction and building sites for lifting heavy materials.
• Marine and offshore applications for handling equipment and supplies.
• Industrial settings where heavy loads need to be lifted and moved efficiently[4].

Key Benefits of Davit Cranes

Strength and Durability

• Made from tough and durable materials such as welded steel construction and corrosion-resistant finishes.
• Capable of lifting heavy loads smoothly and effectively, even in harsh weather conditions[3][4].

Lifting Heavy Loads

• Designed to handle various capacities, making them suitable for different industrial needs.
• The adjustable boom and 360-degree rotation enable easy access to loads from multiple angles[3][4].

Portability and Ease of Installation

• Some davit cranes are portable, with easy-to-install bases that require no extra tools or special skills.
• Quick-release pins and easy disassembly features make them convenient for transport and storage[3][4].

Flexibility and Adjustability

• Adjustable booms can extend to multiple positions and rotate 360 degrees, allowing for flexible operation.
• Boom angles can be adjusted using quick-release pins and ratchet mechanisms[3][4].

Safety Features

• Limit Switches and Safety Brakes: Prevent overloading and ensure safe operation.
• Fall Protection Systems: Include harnesses and safety lines to protect workers during personnel lifting operations.
• Corrosion Resistance: Designed with materials and coatings that resist harsh chemicals and corrosive substances[1].

Ease of Operation

• Manual or Power Operation: Can be configured with manual winches for short lifts or power winches for heavier loads.
• Remote Control: Some davits can be operated remotely, allowing operators to control the crane from a safe distance[1][3].

Maintenance

• Regular inspections and servicing are crucial to ensure safe and efficient operation.
• Check the crane, winch, cables, and other components for signs of wear and tear, and replace any damaged parts as necessary[1].

Additional Features

• Rotation Handle and Bearing: Allow for smooth 360-degree rotation under load.
• Mast Cap and Sheave Clevis Pin: Prevent weather and debris from entering the mast and ensure stable operation.
• Cable Spooler: Keeps wire rope neat and safe when not in use[3].

By understanding these aspects of davit cranes, users can appreciate their versatility, safety features, and the significant benefits they bring to various industrial applications.

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Guide to Davit Cranes

Definition and Basic Functionality

A davit crane is a portable or stationary lifting device consisting of a vertical mast, an extension arm (or boom), and a winch or hoist mechanism. These cranes are designed to lift and lower heavy objects that cannot be moved manually, providing a versatile and flexible solution for various lifting applications.

Types of Davit Cranes

Portable Davit Cranes

• Lightweight and easily transportable, these cranes are ideal for tasks that require frequent movement and setup.
• Often used in multiple locations where the crane needs to be relocated regularly[1][2][4].

Fixed Davit Cranes

• Permanently installed in a specific location, these cranes offer a more stable lifting solution.
• Commonly used in industrial settings where the lifting needs are consistent and localized[1][2].

Telescopic Davit Cranes

• Feature an extendable arm, allowing for increased reach and flexibility.
• Well-suited for applications where variable lifting heights are required. The boom can be adjusted while under load, enhancing versatility[1][3][4].

Jib Davit Cranes

• Have a horizontal jib arm attached to the vertical mast, offering a greater range of motion.
• Useful for maneuvering loads in confined spaces due to their ability to rotate and extend[1][2].

Key Components

Mast

• The vertical support structure that provides stability to the crane.
• Typically made of steel, aluminum, or advanced composite materials, designed to withstand the load capacity of the crane[1][2][3].

Arm (Boom or Jib)

• Extends horizontally from the mast and is responsible for carrying the load.
• Rotates around the mast, and its length and design depend on the specific requirements of the lifting application[1][2][3].

Winch or Hoist

• The mechanism that enables the lifting and lowering of loads.
• Consists of a drum, cable, and motor. Can be manual or electric, with electric winches being more efficient for heavier loads and repetitive operations[1][2][4].

Base or Mounting

• Provides the foundation for the davit crane, ensuring stability and preventing the crane from toppling over.
• Can be portable, fixed, wall-mounted, or mounted on a pedestal, socket base, or freestanding non-penetrating platform with counterweights[1][2][3].

Controls

• Include buttons, levers, or remote devices that allow the operator to control the crane’s movements.
• Essential for safe and precise operation of the crane[1].

Materials and Construction

• Davit cranes can be made from steel, aluminum, or advanced composite materials.
• Composite materials are corrosion-resistant, lighter (approximately 40% lighter than steel), and suitable for environments where weight and corrosion are concerns[2][3].

Selection Criteria

Load Capacity

• Determine the maximum weight you need to lift with the davit crane.
• Crucial to select a crane that can handle the intended load without exceeding its capacity[1].

Reach and Height

• Evaluate the required reach and lifting height for your operations.
• Consider the dimensions and weight of the objects you will be lifting to determine the appropriate arm length and crane height[1].

Space Limitations

• Assess the available space in your worksite or facility.
• Ensure the crane’s dimensions, including its base, mast, and arm, can be accommodated without interfering with other operations or structures[1].

Environmental Factors

• Consider the working environment, including weather conditions and temperature extremes.
• Select a crane with appropriate corrosion-resistant materials if it will be exposed to harsh elements or corrosive substances[1].

Applications and Industries

Davit cranes are used in a variety of industries, including:
– Oil and gas
– Automotive
– Aviation
– Construction
– Mining
– Water and wastewater
– Order fulfillment
– E-commerce and omni-channel fulfillment
– Order packing and packaging
– Third-party logistics (3PL)
– Warehousing
– Transportation[2].

Installation and Mounting Options

• Pedestal Mount: Suitable for permanent or semi-permanent installations.
• Wall Mount: Ideal for locations where floor space is limited.
• Freestanding Non-Penetrating Platform: Used when no parapet is present or when mounting to a parapet is not preferred.
• Socket Base: Allows for easy installation and removal, useful for rooftop applications[2][3].

Safety and Maintenance

• Ensure the crane is properly installed and maintained to prevent accidents.
• Regularly inspect the crane’s components, including the mast, arm, winch, and base, for any signs of wear or damage.
• Follow the manufacturer’s guidelines for maintenance and operation to ensure long-lasting performance and reliability[1][3].

By considering these factors and components, you can select and use a davit crane that meets your specific lifting needs, ensuring safe, efficient, and reliable operations.

Davit Crane

Since the provided query specifies a website that is not accessible in the given search results, I will create a comprehensive guide based on the general characteristics, features, and specifications of davit cranes as gathered from the available sources.

Guide to Davit Cranes

Introduction

Davit cranes are versatile and essential lifting solutions used in various industries, including marine, construction, and industrial settings. They are known for their portability, ease of use, and robust construction.

Key Features of Davit Cranes

Portability and Transportability

• Davit cranes are designed to be portable and can break down into transportable components, making them easy to move and set up in different locations[1][2][3].

Rotation and Maneuverability

• These cranes typically offer 360-degree rotation, allowing for flexible and efficient lifting operations[2][3][4].

Boom Adjustments

• Many davit cranes feature adjustable boom lengths and angles, enabling users to customize the crane to suit different lifting needs. Booms can often be adjusted between horizontal and up to 45 degrees from vertical[1][2][4].

Load Capacity

• Davit cranes are available in various load capacities, ranging from 500 lbs to 5,500 lbs or more, depending on the model and manufacturer[2][4][5].

Winch Options

• Users can choose from manual, AC electric, or DC electric winches, each with its own advantages and suitability for different applications[2][4].

Construction and Materials

• Davit cranes are often made from heavy-duty steel, ensuring robustness and longevity. They may also feature corrosion-resistant finishes such as zinc-plated or powder-coated surfaces[2][4].

Specifications and Technical Details

Boom Length and Reach

• The boom length can vary significantly, with some models offering telescopic booms that can extend to different lengths. For example, some cranes can achieve a maximum hook reach of up to 112 inches[1][4].

Height Adjustments

• The height of the boom can be adjusted, allowing for a range of lifting heights. This adjustment can be made using hand-operated screw jacks or other mechanisms[1][4].

Clearance and Mounting

• There are specific clearance requirements between the mounting surface and the underside of the boom, ensuring safe and effective operation. For instance, some models require a minimum clearance of 24 inches or more[1].

Fastening and Assembly

• Crane components are typically fastened together using stainless steel clevis style pins and lynch pins with lanyards for added security[1].

Safety and Compliance

Testing and Certification

• Davit cranes are individually tested and certified to ensure they meet safety standards. They are often certified at 125% of their rated capacity[2].

Compliance with Standards

• These cranes comply with various international standards such as ASTM, EN13157, and others, ensuring they meet rigorous safety and performance criteria[1][3][4].

Safety Features

• Features like load pressure brakes with double ratchet systems and secure fastening mechanisms ensure safe and stable load holding in any position[3].

Maintenance and Operation

Ease of Use

• Davit cranes are designed for ease of use, with integrated winches and cables, and adjustable cranks to adjust lifting speed. They are often ready to use within a few seconds[3].

Maintenance

• The compact and ergonomic design of davit cranes, along with integrated winches and cables, makes them low-maintenance. Regular checks on wire rope and other components are still necessary to ensure optimal performance[3].

Applications and Uses

Marine and Offshore

• Davit cranes are commonly used in marine and offshore environments for lifting equipment, supplies, and personnel.

Construction and Industrial

• They are also used in construction and industrial settings for lifting heavy loads, materials, and equipment.

Emergency and Rescue

• The portability and quick setup of davit cranes make them suitable for emergency and rescue operations.

Conclusion

Davit cranes offer a versatile and reliable lifting solution for a wide range of applications. Their portability, adjustable features, and robust construction make them an essential tool in various industries. By understanding the key features, specifications, and safety aspects of davit cranes, users can select the right model to meet their specific needs and ensure safe and efficient lifting operations.

Davit cranes

Since the provided URL is not accessible, I will create a comprehensive guide to davit cranes based on the information gathered from the other sources.

Guide to Davit Cranes

Definition and Basic Functionality

A davit crane is a versatile and portable lifting device designed to lift, lower, and position heavy loads. It consists of a vertical mast, an extension arm (or boom), and a winch or hoist mechanism. These cranes are used in various applications where manual lifting is impractical or unsafe[2][4].

Key Components of a Davit Crane

Mast

The mast is the vertical support structure that provides stability to the crane. It is typically made of steel or aluminum and is designed to withstand the load capacity of the crane[2].

Arm (Boom or Jib)

The arm extends horizontally from the mast and is responsible for carrying the load. It can be fixed or adjustable and rotates around the mast to position the load as needed. The arm’s length and design vary depending on the specific requirements of the lifting application[2][4].

Winch or Hoist

The winch or hoist mechanism is crucial for lifting and lowering loads. It includes a drum, cable, and motor. Manual and electric winches are available, with options such as hand winches with automatic disc brakes or electric winches powered by AC or DC motors[2][3].

Base or Mounting

The base provides the foundation for the davit crane, ensuring stability and preventing the crane from toppling during operations. Bases can be portable, fixed, wall-mounted, or attached to steel columns or stub columns[2][4].

Controls

The control system includes buttons, levers, or remote devices that allow the operator to control the crane’s movements. Proper control systems are essential for safe and precise operation[2].

Types of Davit Cranes

Portable Davit Cranes

These cranes are lightweight and easily transportable, making them ideal for tasks that require frequent crane movement and setup. They are often used in various locations and can be quickly assembled and disassembled[2][4].

Fixed Davit Cranes

Fixed davit cranes are permanently installed in a specific location, providing a more stable lifting solution. They are commonly used in industrial settings where the lifting needs are consistent[2].

Telescopic Davit Cranes

These cranes feature an extendable arm, allowing for increased reach and flexibility. They are well-suited for applications where variable lifting heights are required[2].

Jib Davit Cranes

Jib davit cranes have a horizontal jib arm attached to the vertical mast, offering a greater range of motion. This configuration is useful for maneuvering loads in confined spaces[2].

Installation and Assembly

Preparing the Base or Mounting

Ensure the base is properly positioned and secured according to the manufacturer’s instructions. This may involve anchor bolt placement and tightening[2].

Attaching the Mast

Connect the mast to the base, ensuring a secure and stable connection. Use appropriate fasteners and tighten them according to the manufacturer’s specifications[2].

Installing the Arm

Attach the arm to the mast, ensuring it is aligned properly and securely connected. Follow the manufacturer’s instructions for proper assembly and tightening[2].

Mounting the Winch or Hoist

Install the winch or hoist mechanism on the designated section of the davit crane. Ensure it is correctly aligned and securely mounted. Connect the control cables or wires according to the manufacturer’s instructions[2].

Applications and Uses

Davit cranes are versatile and can be used in a variety of settings, including:
– Rooftop Maintenance: For tasks such as hauling filters to rooftop units for maintenance[1].
– Confined Spaces: Ideal for lifting and lowering workers or equipment in confined spaces[1][2].
– Industrial Settings: Commonly used for lifting heavy loads in industrial environments[2].
– Construction Sites: Useful for lifting materials and equipment over walls or ledges[4].

Advantages

• Lightweight and Compact: Davit cranes are often more economical and lightweight compared to other types of cranes, making them suitable for limited spaces[4][5].
• Flexible Mounting Options: Available in various base types such as pedestal, flush, and wall mount, offering flexibility in selecting the optimal mounting location[4][5].
• Extension Capability: Can safely extend over walls or ledges, which is not easily achievable with standard gantry cranes[4].
• Customization: Offer a variety of finishes and base type options, making them customizable for specific lifting problems in different environments[5].

Safety Considerations

• Regular Inspection: Inspect the crane carefully for any damage before use. Ensure all components are securely fastened and functioning correctly[3].
• Proper Assembly: Follow the manufacturer’s instructions for assembly and disassembly to ensure safe operation[2][3].
• Operator Training: Ensure operators are trained to use the davit crane safely and efficiently[2].

By understanding the components, types, and applications of davit cranes, users can make informed decisions and ensure safe and efficient lifting operations.

Hydraulic Gravity Davit

Guide to Hydraulic Gravity Davits for Lifeboat Launching and Recovery

Introduction

Hydraulic gravity davits are specialized equipment designed for the safe and efficient launching and recovering of lifeboats on ships. These systems are crucial for maritime safety, complying with international regulations and ensuring the swift deployment of lifeboats in emergency situations.

Key Components and Functionality

Hydraulic Gravity Luffing Arm Davit

• This type of davit utilizes a hydraulic system to pivot and lower the lifeboat into the water, leveraging gravity for the lowering process.
• The davit is equipped with a hydraulic luffing arm, which allows for controlled movement and precise positioning of the lifeboat[5].

Main Data and Specifications

• Max Working Load: The maximum weight the davit can handle during operation. For example, models like HLA85, HLA125, and HLA210 have working loads of 85KN, 125KN, and 210KN respectively.
• Max Recovering Load: The maximum weight the davit can recover, typically lower than the working load. For instance, the HLA85 model has a recovering load of 45KN.
• Min Lowering Load: The minimum weight required for the gravity-assisted lowering process. This is usually around 30KN for the HLA85 model.
• Specification of Steel Wire Rope: Details the type and dimensions of the steel wire rope used, such as Φ20-18*19-1770-FC.
• Model of Winch: Specifies the type of winch used for recovering the lifeboat, e.g., D63S/Z.
• Pump Station Electric Motor: Details the electric motor used in the pump station, such as Y160L-4-H[5].

Operational Aspects

Launching Process

• The lifeboat is launched using the hydraulic luffing arm, which pivots to position the boat over the water.
• Gravity assists in lowering the lifeboat into the water, ensuring a smooth and controlled descent.
• The process can be controlled remotely from within the lifeboat or manually from the deck using the winch[5].

Recovery Process

• Recovery of the lifeboat is facilitated by the electric-driven winch.
• The hydraulic system helps in lifting and pivoting the lifeboat back to its stowed position on the ship.
• This process ensures the safe and efficient retrieval of the lifeboat and its occupants[5].

Safety and Compliance

Regulatory Compliance

• Hydraulic gravity davits are manufactured and tested in compliance with major classification societies and international regulations such as SOLAS 1974 and its amendments.
• These davits meet the requirements of various maritime safety codes, ensuring they are safe and reliable for emergency situations[5].

Allowable Working Inclination Angle

• The davits are designed to operate within specific inclination angles (trim and list) to ensure stability and safety. For example, the allowable working inclination angles are typically Trim ≤10° and List ≤ 20°[5].

Installation and Maintenance

Installation Considerations

• The davits are designed to be installed on a free deck, ensuring there are no obstructions during the launching and recovery process.
• Modular built systems are available, making installation easier and adaptable to different deck spaces[4].

Maintenance Requirements

• Regular maintenance is crucial to ensure the davit’s functionality and safety.
• This includes checking the hydraulic system, winch, and steel wire rope for any signs of wear or damage.

Advantages

Efficiency and Safety

• Hydraulic gravity davits offer a highly efficient and safe method for launching and recovering lifeboats.
• The use of gravity in the lowering process reduces the load on the hydraulic system, making the operation smoother and more reliable.

Compliance with Regulations

• These davits are designed to meet stringent international safety regulations, providing assurance of their reliability in emergency situations.

Ease of Operation

• The systems are designed for easy operation, with options for remote control from within the lifeboat or manual operation from the deck.

Conclusion

Hydraulic gravity davits are essential components of a ship’s life-saving appliances, ensuring the swift and safe deployment of lifeboats. By understanding the key components, operational aspects, safety compliance, and installation requirements, users can make informed decisions and ensure these systems are maintained and operated effectively.

Yacht Davit Crane Manufacturer In China

Guide to Yacht Davit Cranes

Introduction

Yacht davit cranes are essential components of superyachts and other vessels, serving multiple purposes from launching tenders and water toys to handling lifeboats and emergency equipment. Here is a comprehensive guide to help you understand the intricacies, types, and operational aspects of yacht davit cranes.

Types of Davit Cranes

Fixed Boom Cranes

• These cranes are known for their reliability, safety, and versatility. They are often used on superyachts ranging from 30 to 115+ meters in length.
• They come in various safe working loads (SWL) ranging from 2,500lbs to 20,000+ lbs and comply with different class options such as Cargo, MCA, SOLAS, and HOP[4].

Extending Boom Cranes

• These cranes offer greater reach due to their single or double telescoping boom sections. They are ideal for sundeck or foredeck applications on large superyachts.
• They provide a wide range of deployment options for tenders, toys, and lifesaving equipment[4].

Slewing Beam Cranes

• These cranes are mounted to the bulkheads of the tender garage, allowing for a full flexible tender garage layout.
• They enable the deck construction to be lower compared to fixed sliding beam cranes, creating space for other amenities like beach clubs and gyms[1].

Sliding Beam Cranes

• These are the most commonly used type, often employed as single-arm cranes for smaller tenders or jet skis.
• Larger yachts may use a set of two sliding davits to launch tenders alongside the yacht[1].

Materials and Construction

• Traditional davits are typically made from stainless steel or aluminum, which are lightweight and resistant to corrosion.
• Modern designs are beginning to utilize composite materials like carbon fiber, offering the same strength with reduced weight and increased flexibility[3].

Control and Operation

• Davits can be controlled manually, electrically, or hydraulically. Superyachts often opt for electrical or hydraulic control due to the size and weight of the loads they handle.
• Advanced systems may include self-braking winch systems and custom hydraulic cylinders for smooth and controlled operations[1][3].

Safety and Convenience

• Safety is paramount; davit cranes are designed to protect users from injury and ensure a reliable workplace.
• Features like one-button electrical operation allow for quick, worry-free access to tenders and toys, reducing the risk of injury and increasing productivity[2][3].

Installation and Maintenance

• Proper installation is crucial and should be performed by professionals to ensure maximum potential and safety.
• Maintenance should also be handled by professionals, although basic maintenance can be performed by users. It is important to follow the manufacturer’s instructions[3].

Common Uses

• Tender and Water Toy Handling: Davits are primarily used to lower and retrieve tenders, jet skis, and other water toys.
• Lifeboat Deployment: Originally used for emergency lifeboat deployment and man-overboard incidents.
• Cargo Handling: Used for loading materials, provisions, and other equipment aboard the yacht[1][3].

Portable Davit Cranes

• These cranes are designed for easy transport and setup, saving on installation costs and making work more efficient.
• They can be configured with manual, AC, DC, pneumatic, or hydraulic operation and are versatile enough to be used in various industries beyond yachting, such as wastewater treatment and industrial settings[2].

Key Considerations for Selection

• Safe Working Load (SWL): Ensure the crane’s SWL matches the weight of the loads it will handle.
• Reach and Capacity: Choose a crane that offers the necessary reach and capacity for your specific needs.
• Mounting Options: Consider the mounting configuration, such as low profile base, pedestal base, or rotating standpipe, to suit your deck layout[1][4].

User Experience and Reliability

• Look for cranes with a reputation for reliability and ease of use, especially as users age.
• Features like simple and safe launch/recovery mechanisms and easy maintenance are crucial for long-term satisfaction[5].

By understanding these aspects, you can make an informed decision when selecting and operating a yacht davit crane, ensuring safe, efficient, and convenient handling of your tenders, water toys, and other equipment.

Portable Davit Cranes – Thern

Guide to Portable Davit Cranes

Introduction

Portable davit cranes are versatile and efficient lifting solutions designed to meet various industrial and commercial needs. They offer a combination of portability, ease of use, and cost-effectiveness, making them an ideal choice for numerous applications.

Key Features of Portable Davit Cranes

Design and Construction

• Portable davit cranes consist of an angled beam (boom) that pivots over a vertical axis, allowing for easy movement and positioning of heavy loads[2][3][5].
• They can be made from durable materials such as steel or advanced composite materials, which are lightweight and corrosion-resistant[4].

Portability and Mobility

• These cranes are designed for easy transport and storage, breaking down into components that can be quickly set up and disassembled. This feature saves on installation costs and enhances productivity[1][2][3].
• Mobile davit cranes often come with bases mounted on wheels, enabling easy movement to different locations[2].

Operation Modes

• Portable davit cranes can be operated manually using hand winches or powered by AC, DC, pneumatic, or hydraulic systems. Manual winches are effective in situations where no power source is available, while powered winches reduce physical effort and increase efficiency[1][2][3].

Benefits of Using Portable Davit Cranes

Safety and Convenience

• Portable davit cranes are designed to enhance safety on the job site. They can be placed in optimal locations to make the job safer and more resourceful, reducing the risk of injury and increasing morale and productivity[1].
• Features like remote control operation and consistent lifting speeds contribute to enhanced safety and convenience[2].

Cost-Effectiveness

• Manual davit cranes are generally less expensive than electric models, making them a cost-effective option for lighter lifting tasks. The portability and reusability of these cranes also reduce the need for multiple cranes, saving on overall costs[1][2][3].

Versatility and Flexibility

• Portable davit cranes can be used in multiple locations without extensive installation or anchoring. They come in various sizes and capacities, making them suitable for different material handling applications[2][3].
• These cranes can be mounted on different types of bases (pedestal, wall mount, socket, etc.), offering flexibility in selecting the optimal mounting location[5].

Ease of Installation and Maintenance

• Portable davit cranes require minimal installation effort and do not need extra tools or specialized skills. They are easy to assemble, disassemble, and store, which saves time and resources[1][3].
• Regular inspection and proper storage are recommended to increase the lifespan of the crane[3].

Common Applications of Portable Davit Cranes

Wastewater Treatment

• Portable davit cranes are widely used in wastewater treatment plants for lifting pumps, mixers, screens, and motors. Their durability and corrosion-resistant finish make them suitable for harsh environments[1].

Boat and Dock Mounted

• These cranes are useful for cargo handling, loading, and unloading maintenance equipment and supplies on docks. They can also be used by boat owners to lift and store boats efficiently[1].

Energy and Industrial Settings

• Portable davit cranes are used in various industrial settings, such as the NASA Stennis Space Center, for tasks like testing rockets and lifting HVAC equipment onto high-rise buildings[1][2].

Construction and Manufacturing

• They are beneficial in construction projects, manufacturing, material hauling, and warehousing due to their ability to lift and position heavy loads with precision[2][3].

Technical Advantages

Adjustable and Rotating Boom

• The boom of a portable davit crane can be adjusted and rotated 360 degrees, allowing for flexible lifting and positioning of loads from various angles[2][3][4].

Lightweight and Corrosion-Resistant

• Models made from advanced composite materials are significantly lighter than traditional steel models, yet they maintain high lifting capacities and are corrosion-resistant[4].

Multiple Base Options

• Portable davit cranes can be used with multiple bases, reducing the need for multiple cranes and making them a cost-effective solution for various projects[1][5].

Conclusion

Portable davit cranes offer a robust, versatile, and cost-effective solution for a wide range of lifting and positioning tasks. Their portability, ease of installation, and flexibility in operation make them an essential tool in various industries. By understanding the key features, benefits, and applications of portable davit cranes, users can optimize their material handling processes and enhance overall efficiency and safety.

China Davits Ship Crane Manufacturers, Suppliers

Guide to Davits Used in Marine Applications

Introduction

Davits are crane-like devices essential for ship safety and operations, particularly in the deployment and recovery of lifeboats, rescue boats, and other equipment. Here is a comprehensive guide to the types, components, and functionalities of davits.

Types of Davits

Single Arm Davit

• This type of davit is primarily used for launching and recovering rescue boats and life rafts.
• It features electrical or manual hoisting and gravity lowering capabilities.
• The davit arm can slew based on pressure oil provided by a pump station, hand pump, or accumulator[1].

Traveler Davit

• This system allows for safe and automatic davit lowering.
• It uses two cables: one as a grip to hold the other in place, which can be adjusted using the cable to allow for movement on rails.
• The release of the grip cable enables the boat to fall[1].

Sling Davit

• Designed for smaller boats, this system consists of a sling that the boat rests in and is used to lower.
• It can also be used with larger boats[1].

A-Frame Davit

• This is a luffing type rescue boat davit with the ability to launch and recover rescue boats using gravity and power.
• Available in electric and hydraulic types, the hydraulic type includes a wave compensation system for recovering boats in rough seas[1].

Pull-On Davit

• Similar to the traveler davit but uses a cable release system instead.
• The boat falls if the cable is pulled or pushed[1].

Hydraulic Gravity Davit

• Specialized for shipboard launching and recovering lifeboats.
• Capable of safely launching a lifeboat under adverse conditions such as a trim of up to 10 degrees and a list of up to 20 degrees.
• Uses gravity for lowering and can operate independently of the parent ship’s power[1].

Crane Davit

• A giant folding crane that lowers and lifts the lifeboat.
• Requires sufficient space or must be built into the ship itself[1].

Free Fall Davit

• Lifeboat slides directly off the vessel without using falls.
• Requires the lifeboat to be of an enclosed type.
• Commonly used on merchant ships[2].

Fixed Davit

• Lifeboat is hung above the water at embarkation level and lowered into the water.
• Common on oil rigs[2].

Components of Davits

Liferaft

• Can be enclosed, partially enclosed, or open.
• Each type serves different needs and safety requirements[2].

Frapping Lines

• Used on all davits except fixed and free-fall davits.
• Pull the lifeboat over to the embarkation deck along with the tricing pendant[2].

Gripes

• Ropes used to hold the lifeboat in the stored position while underway[2].

Tricing Pendants

• Lines used to initially pull the lifeboat over to the embarkation deck so that the frapping lines can be connected[2].

Falls

• Wires that lift or lower the lifeboat[2].

Historical Development and Materials

Historical Development

• Davits were first devised in the 17th century for whaling ships.
• Introduced into Royal Navy warships in the late 18th century, initially made from squared baulks of timber.
• Curved iron davits were introduced later in the 19th century[2].

Materials

• Traditionally made from aluminium or steel.
• Recent advances include the use of composite materials like carbon fibre, which offers an excellent strength-to-weight ratio.
• This allows for more efficient stowage and use in multiple deck sockets[2].

Operational and Safety Considerations

Deployment and Recovery

• Davits are crucial for lowering lifeboats to the embarkation level for boarding.
• They can also be used as man-overboard safety devices to retrieve personnel from the water[2].

Regulatory Compliance

• The operation and maintenance of davits are under the jurisdiction of the International Maritime Organization.
• Regulations are enforced by the country’s own coast guard[2].

Conclusion

Davits play a critical role in maritime safety and operations. Understanding the various types, components, and historical development of davits is essential for ensuring safe and efficient deployment and recovery of lifeboats and other equipment. Each type of davit is designed to meet specific needs and conditions, making them indispensable in the maritime industry.

Frequently Asked Questions (FAQs)

What are the primary uses of a davit crane, especially in maritime applications?

Davit cranes are widely used in maritime applications for various purposes, including the handling of lifeboats, life rafts, and other equipment. They are particularly essential for lowering and lifting lifeboats or life rafts to and from the water, ensuring safe and efficient rescue operations. Additionally, davit cranes can be used for handling goods, such as pipes in pipelay operations, and for lifting smaller boats like dinghies and motorboats on yachts and other vessels. Their versatility and ability to operate in different sea conditions make them a crucial piece of equipment in the marine industry[3][4].

How do davit cranes differ from jib cranes in terms of installation and operation?

Davit cranes and jib cranes have distinct differences in their installation and operation. Davit cranes require only a minimal amount of reinforced concrete for mounting, typically just six inches, which makes them more portable and easier to install compared to jib cranes. Jib cranes, on the other hand, need a deeper and more extensive footing, increasing the cost and complexity of the installation. In terms of operation, davit cranes use a winch drum for lifting, which allows for higher lifting rates and easier operation, especially with the winch located away from the load. In contrast, jib cranes often use chain hoists, which are slower and less safe for longer lifts[1].

What are the key components and features of a davit crane?

A davit crane typically consists of several key components, including a hoisting winch, an A-frame with a hook block, and sometimes a hydraulic power pack unit for hydraulic models. They often feature a telescoping boom and adjustable boom angle, which enhance their flexibility. Davit cranes can be controlled via centralized remote control units, and some models offer wireless control options. Additional features include 360° hydraulic slewing, luffing capabilities, and constant tension systems to ensure stable and secure lifting operations. The cranes are also designed with materials like marine stainless steel and aluminum, and they may include emergency pumps that do not require power[2][3].

What are the advantages of using a davit crane over other types of cranes?

Davit cranes offer several advantages that make them a preferred choice in many applications. They are highly customizable, allowing them to fit specific lifting needs in various environments. Davit cranes are generally more portable and lightweight compared to jib cranes, making them easier to transport and install. The use of a winch drum for lifting provides higher lifting rates and easier operation, and the ability to rotate the boom with a handle safely away from the load enhances safety. Additionally, davit cranes require less extensive and costly installations, making them a more economical option[1][3].

What safety features and certifications are typically associated with davit cranes?

Davit cranes, especially those used in maritime applications, are designed with several safety features and adhere to various certifications. They are often manufactured according to the latest regulations of classification societies such as ABS, CCS, DNV(GL), and others. Safety features include wave compensation systems for hydraulic boat davits to handle rough sea conditions, emergency pumps that do not require power, and constant tension systems to maintain stability during lifting operations. These cranes also meet international standards like SOLAS 1974 and IMO requirements, ensuring they are reliable, safe, and compliant with industry regulations[3][4].