Crane And Grab

 

Provides exceptional strength and stability.Suitable for large spans and heavy loads, ensuring operational reliability.Equipped with mechanical or hydraulic grab buckets to handle bulk materials like coal, ore, waste, sand, or grain.Customizable grab types to meet the requirements of specific industries.Typically ranges from 5 to 50 tons or more.Designed for frequent use in demanding environments.

Options include manual, semi-automatic, or fully automated control systems.Smooth and precise movement for improved efficiency.Includes overload protection, anti-sway technology, emergency stop systems, and limit switches.Ensures safe operation in heavy-duty applications.Made with high-quality materials to withstand extreme environments.Can be tailored for specific needs, such as corrosive environments or high-temperature applications.

Core Components：PLC, Engine, Bearing, Gearbox, motor, Pressure vessel, Gear, Pump

Place of Origin：Henan, China

Warranty：12 Months

Weight (KG)：15000 kg

Video outgoing-inspection：Provided

Machinery Test Report：Provided

Product Name：grab Bridge Crane

Hoisting Device：trolley

Max.wheel pressure;167-233

Working Duty;A3-A5

Power Source：3-phase AC;50Hz;380v

Color：customized

Over Load Protection：included

Operational method：ground control; cabin control

Oversea Installation;provided

1.Main beam

1)Load Distribution:

Evenly distributes the load from the grab bucket, trolley, and other components to the end carriages and support structures.

2)Structural Stability:

Provides a stable framework for lifting operations, ensuring smooth and efficient material handling.

3)Durability:

Built to endure extreme operating conditions, including heavy loads, high temperatures, and corrosive environments.

4)Precision Movement:

Facilitates smooth travel of the trolley and grab bucket across the crane and grab's span for precise and controlled material handling.

 

 

2.Lifting System

1)High Lifting Capacity:

Designed to lift heavy loads ranging from 5 to 50 tons or more.The capacity can be customized to meet specific industrial requirements.

2)Durable and Reliable:

Built to withstand harsh environments, such as ports, steel mills, and waste processing plants.Components are made from high-quality materials to ensure long service life and minimal maintenance.

3)Precision Handling:

The system allows for accurate control of the grab bucket, ensuring efficient material pickup and release.Smooth operation reduces spillage and maximizes productivity.

4)Safety Features:

Overload protection to prevent lifting beyond the crane and grab's capacity.Emergency stop systems and limit switches for added safety.Brake systems ensure secure holding of loads during operation or downtime.

 

3.End carriage

Key Functions of the End Carriage

1)Support and Movement:

Supports the weight of the crane bridge, trolley, grab mechanism, and load.Facilitates smooth horizontal movement of the crane and grab across its runway.

2)Load Transfer:

Distributes the load from the main girders to the runway tracks evenly, reducing stress on the structure.

3)Precision Travel:

Ensures stable and accurate travel along the runway, enabling precise positioning of the grab bucket for material handling.

4)Safety and Stability:

Prevents derailment and absorbs shocks, ensuring safe operation during high-speed travel or sudden stops.

4.Crane travelling mechanism

Working Principle of the Crane Traveling Mechanism

1)The electric motor generates power to drive the wheels.

2)The power is transmitted through the gearbox and couplings, optimizing the speed and torque.

3)The wheels move along the rails, enabling the entire crane to travel horizontally.

4)Guiding rollers ensure proper alignment, and brakes control stopping or holding positions.

5.Trolley travelling mechanism

1)Advantages of a Well-Designed Trolley Traveling Mechanism

Operational Efficiency:Smooth and fast trolley travel enhances productivity.

Reliability:Built for continuous operation in demanding industrial environments.

Safety:Includes advanced alignment and braking systems to minimize risks.

Flexibility:Adjustable speeds and customizable features suit a wide range of applications.

Minimal Maintenance:Durable components reduce downtime and maintenance costs.

The trolley traveling mechanism in a crane and grab is a high-precision system designed to facilitate the horizontal movement of the trolley. Its robust construction and advanced features ensure efficient and reliable performance in various industrial applications.

6.Crane wheel

Common Challenges and Solutions

1)Wear and Tear:

Regular use in heavy-duty operations can lead to wheel wear.

Solution: Use hardened wheels and conduct regular inspections for timely replacement.

2)Misalignment:

Misaligned rails can cause uneven wear and damage.

Solution: Ensure proper rail installation and alignment during crane setup.

3)Cracking or Deformation:

Overloading or impacts can cause cracks or deformations.

Solution: Use wheels with high load-bearing capacity and include overload protection systems.

4)Noise and Vibration:

Poor-quality wheels or misaligned rails can increase operational noise and vibration.

Solution: Use precision-machined wheels and maintain rail alignment.

7.Crane grab

Maintenance of the Crane Grab

1)Regular Inspection:

Check the grab shells, ropes, and pulleys for signs of wear, cracks, or deformation.

2)Lubrication:

Apply grease or oil to moving parts like pulleys and joints to ensure smooth operation.

3)Rope Replacement:

Replace worn or frayed ropes to avoid sudden failures.

4)Hydraulic System Maintenance (if applicable):

Check hydraulic cylinders, hoses, and pumps for leaks or pressure issues.

5)Cleaning:

Remove debris and material residue to prevent clogging or corrosion.

8.Motor

Key Types of Motors in crane and grabs

1)Hoist Motor:

Powers the lifting mechanism for raising and lowering loads.Designed for high starting torque to handle heavy loads.

2)Trolley Traveling Motor:

Drives the trolley's horizontal movement along the crane's main girders.Equipped with variable speed control for precise positioning.

3)Crane Traveling Motor:

Moves the entire crane along the runway rails.Ensures smooth acceleration and deceleration to reduce operational stress.

4)Grab Motor (for Hydraulic Grabs):

Used in hydraulic grab systems to operate the grab bucket's opening and closing mechanisms.Provides high power and precision for efficient material handling.

9.Sound and light alarm system & limit switch

1)Sound and Light Alarm System

The Sound and Light Alarm System serves as a warning mechanism to enhance safety during crane operations.

Functions:

Warns personnel to maintain a safe distance from the crane and load.

Reduces the risk of accidents caused by collisions or unawareness of crane movement.

Alerts operators and workers of potential system issues or overloads.

2)Limit Switches

Limit switches are safety devices installed to control and restrict the movement of the crane, trolley, or hoist. They prevent the crane from exceeding safe operational boundaries.

10.Safety Devices

1)Overload Protection Device

Prevents the crane from lifting loads beyond its rated capacity.Includes a load cell or strain gauge to monitor weight and trigger an alarm or stop the operation if the load exceeds the limit.

2)Limit Switches

Hoist Limit Switch: Stops lifting or lowering when the hook or grab reaches the upper or lower limit.Travel Limit Switch: Stops crane or trolley movement at the end of their tracks, preventing collisions with end stops.Grab Opening/Closing Limit Switch: Ensures the grab does not exceed its operating range.

3)Emergency Stop System

A manually operated button or switch that halts all crane operations instantly in the event of an emergency.Located at accessible points for operators and maintenance personnel.

4)Anti-Collision Device

Prevents collisions between two cranes operating on the same runway or between the crane and other obstacles.Utilizes infrared sensors, ultrasonic sensors, or proximity detectors.

5)Buffer System

Installed at the ends of the crane's travel path to absorb impact energy and prevent damage during accidental over-travel.Typically made of rubber, spring, or hydraulic materials.

6)Sound and Light Alarm System

Provides audible and visual warnings during crane operations, such as lifting, traveling, or system faults.Alerts nearby personnel to stay clear of the crane's operational area.

11.Control Mode

1)Pendant Control

Operated via a wired handheld pendant connected to the crane.The operator can walk alongside the crane to closely monitor operations.

2)Cabin Control

Operated from an enclosed cabin attached to the crane.Provides a panoramic view of the working area, allowing precise control.

3)Remote Control

Wireless operation using a radio remote control or infrared system.The operator can control the crane from a distance, ensuring flexibility and safety.

4)Semi-Automatic Control

Combines manual control (via pendant, cabin, or remote) with automated functions for specific tasks.Commonly used for repetitive material handling operations.

5)Fully Automatic Control

Fully automated operation with minimal human intervention.Suitable for high-precision applications, such as warehouses, ports, or bulk material handling plants.

12.Sketch

1. High Lifting Capacity

The double-girder structure provides superior strength and stability, enabling the crane to handle heavy loads ranging from 5 tons to over 100 tons.Ideal for lifting and transporting bulk materials like coal, ore, waste, or sand.

2. Excellent Structural Rigidity

The dual girder design ensures better rigidity and reduces deflection, even under maximum load.This makes it suitable for demanding applications where precision and durability are critical.

3. Efficient Material Handling with Grab Mechanism

Equipped with a grab bucket, the crane is perfect for handling bulk materials quickly and efficiently.The grab mechanism can handle various materials such as:

Sand, gravel, coal, and ore.

Industrial waste or recycling materials.

Grain and other agricultural products.

4. Wide Span and Coverage Area

Can be designed for a wide span, providing coverage over large operational areas.Ideal for large industrial plants, warehouses, ports, and stockyards.

5. High Operational Efficiency

Offers faster lifting, lowering, and traveling speeds compared to single girder cranes.Advanced control systems, such as remote control, semi-automatic, or fully automatic modes, enhance operational efficiency.

Reduces material handling time, improving overall productivity.

1. Ports and Harbors

Application: Handling bulk cargo such as coal, grain, sand, fertilizer, and ore during loading and unloading operations.

Advantages:High lifting capacity for heavy-duty operations.Fast and efficient material handling, reducing turnaround time for ships.Suitable for outdoor environments with wind-resistant designs.

2. Steel Mills and Metallurgical Industries

Application: Transporting raw materials such as coal, iron ore, and slag, as well as handling hot and heavy loads.

Advantages:

Heat-resistant components for high-temperature environments.High precision in lifting and positioning materials.Durability in harsh industrial conditions.

3. Power Plants

Application:

Coal-Fired Power Plants: Transporting coal to furnaces and removing ash.Waste-to-Energy Plants: Handling waste and ash efficiently.

Advantages:

Equipped with advanced grab mechanisms for handling bulk materials.Enhanced safety features for continuous operation in high-risk environments.

4. Waste Management and Recycling Plants

Application:

Lifting and transporting solid waste, scrap metal, and recyclable materials.Sorting and loading waste for further processing or disposal.

Advantages:

Precise and efficient grab mechanisms for handling irregularly shaped materials.Can operate in dusty and corrosive environments.

1. Requirement Analysis and Planning

Gather the client's specific requirements.Understand operational needs: load capacity, lifting height, working environment, and grab type.Assess the application for material handling, such as bulk materials like coal, sand, or gravel.Finalize technical specifications and confirm with the client.

2. Design and Engineering

Create an accurate design blueprint and structural analysis.Develop CAD drawings for main girder, trolley, grab mechanism, and end carriages.Perform finite element analysis (FEA) for structural integrity.Select appropriate motors, hoists, and electrical components.Confirm design with the client before production begins.

3. Material Procurement

Source high-quality raw materials and components.Steel plates for girders and grab mechanism.Motors, gearboxes, wire ropes, and electrical components.Grab bucket materials specific to the application (e.g., abrasion-resistant steel).Materials undergo strict quality checks to ensure compliance with standards.

4. Fabrication of Main Girders

Construct the double girder structure.Steel plates are cut to the required size using CNC machines.Weld the plates to form box girders or I-beams.Perform stress-relieving treatments to remove welding stresses.Conduct non-destructive testing (NDT) to ensure weld quality.Sandblast the surface and apply anti-corrosion primer.

5. Fabrication of End Carriages

Build the end carriages that support the main girders.Weld and assemble the end carriage structure.Install wheels, axles, and bearings.Conduct alignment tests to ensure smooth movement.Apply protective coatings for durability.

6. Manufacturing of Grab Mechanism

Produce the grab bucket for material handling.Cut steel plates to form the grab bucket.Assemble hydraulic or mechanical grab systems.

Install pulleys, ropes, and hinges.Test the opening, closing, and grabbing actions.Apply anti-corrosion coatings for abrasive environments.

7. Trolley Manufacturing

Assemble the trolley with the hoisting and grab mechanisms.Fabricate the trolley frame using high-precision welding.Install hoisting motors, wire rope drums, and pulleys.Attach the grab mechanism to the trolley.Conduct functional tests to ensure smooth operation.

8. Electrical System Integration

Install and wire the crane's electrical components.Install control panels, limit switches, and safety alarms.Wire hoisting motors, trolley travel motors, and crane travel motors.Program control systems for remote or manual operation.Test all electrical components for reliability and safety.

9. Final Assembly

Assemble all the crane components into a functional system.Attach the main girders to the end carriages.Mount the trolley and grab mechanism onto the main girders.Connect all electrical wiring and mechanical components.Perform alignment checks and adjustments.

10. Quality Testing

Verify the crane's safety, durability, and functionality.

Load Test: Test lifting capacity with loads exceeding the rated capacity.

Operational Test: Test hoisting, trolley travel, and crane travel mechanisms.

Grab Test: Ensure smooth operation of the grab mechanism.

Electrical Test: Verify control systems, limit switches, and alarms.

Safety Test: Ensure compliance with industry safety standards.

11. Surface Treatment

Protect the crane against environmental damage.Sandblast all structural components.Apply anti-corrosion primer and topcoat paint.Label and mark components with identification tags.

12. Packaging and Transportation

Safely transport the crane to the installation site.Disassemble large components for efficient transport.Pack smaller components and electrical parts securely.Load components onto trucks or containers with protective measures.

 

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.

 

 

 

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